Examples with solutions for Solving Equations Using All Methods: Using fractions

Exercise #1

Find the value of the parameter X

3x19=89 3x-\frac{1}{9}=\frac{8}{9}

Video Solution

Step-by-Step Solution

To find the value of xx in the given equation, we will perform the following steps:

  • Step 1: Start with the equation given: 3x19=893x - \frac{1}{9} = \frac{8}{9}.
  • Step 2: To eliminate the constant 19-\frac{1}{9} on the left, add 19\frac{1}{9} to both sides:

3x19+19=89+193x - \frac{1}{9} + \frac{1}{9} = \frac{8}{9} + \frac{1}{9}

This simplifies to:

3x=89+193x = \frac{8}{9} + \frac{1}{9}

Combine the fractions on the right side:

89+19=99=1\frac{8}{9} + \frac{1}{9} = \frac{9}{9} = 1

So, now we have:

3x=13x = 1

  • Step 3: Divide both sides by 3 to solve for xx:

x=13x = \frac{1}{3}

Thus, the solution to the equation is:

x=13x = \frac{1}{3}

Answer

13 \frac{1}{3}

Exercise #2

Solve for X:

16x13=13 \frac{1}{6}x-\frac{1}{3}=\frac{1}{3}

Video Solution

Step-by-Step Solution

To solve the equation 16x13=13 \frac{1}{6}x - \frac{1}{3} = \frac{1}{3} , we will take the following steps:

  • Step 1: Eliminate fractions by multiplying the entire equation by the least common multiple of the denominators 6 6 .
  • Step 2: Simplify the resulting equation.
  • Step 3: Isolate the variable x x .

Let's proceed with the solution:

Step 1: Multiply the entire equation by 6 6 to clear fractions:
6(16x13)=6×13 6 \left(\frac{1}{6}x - \frac{1}{3}\right) = 6 \times \frac{1}{3}

Step 2: Simplify:
x2=2 x - 2 = 2

Step 3: Solve for x x by adding 2 2 to both sides:
x=2+2 x = 2 + 2

Therefore, x=4 x = 4 .

Answer

4 4

Exercise #3

Find the value of the parameter X

13x=19 \frac{1}{3}x=\frac{1}{9}

Video Solution

Step-by-Step Solution

To solve this problem, we'll follow these steps:

  • Identify the given fraction equation.
  • Multiply both sides of the equation by the reciprocal of the coefficient of x x .
  • Simplify to isolate x x .

Now, let's work through these steps:
Step 1: The problem gives us the equation 13x=19 \frac{1}{3} x = \frac{1}{9} .
Step 2: We multiply both sides by 3 to eliminate the fraction on the left side:

3×13x=3×19 3 \times \frac{1}{3} x = 3 \times \frac{1}{9}

Step 3: Simplifying both sides results in:

x=39 x = \frac{3}{9}

Further simplification of 39\frac{3}{9} yields:

x=13 x = \frac{1}{3}

Therefore, the solution to the problem is 13 \frac{1}{3} .

Answer

13 \frac{1}{3}

Exercise #4

Find the value of the parameter X

13x+56=16 \frac{1}{3}x+\frac{5}{6}=-\frac{1}{6}

Video Solution

Step-by-Step Solution

First, we will arrange the equation so that we have variables on one side and numbers on the other side.

Therefore, we will move 56 \frac{5}{6} to the other side, and we will get

13x=1656 \frac{1}{3}x=-\frac{1}{6}-\frac{5}{6}

Note that the two fractions on the right side share the same denominator, so you can subtract them:

 13x=66 \frac{1}{3}x=-\frac{6}{6}

Observe the minus sign on the right side!

 

13x=1 \frac{1}{3}x=-1

 

Now, we will try to get rid of the denominator, we will do this by multiplying the entire exercise by the denominator (that is, all terms on both sides of the equation):

1x=3 1x=-3

 x=3 x=-3

Answer

-3

Exercise #5

Solve for X:
23x46=13 \frac{2}{3}x-\frac{4}{6}=\frac{1}{3}

Video Solution

Step-by-Step Solution

Let's solve the equation 23x46=13 \frac{2}{3}x - \frac{4}{6} = \frac{1}{3} .

Step 1: Simplify the fractions.

  • The term 46\frac{4}{6} is equivalent to 23\frac{2}{3} after simplification.

Now, the equation can be rewritten as:

23x23=13\frac{2}{3}x - \frac{2}{3} = \frac{1}{3}

Step 2: Add 23\frac{2}{3} to both sides to isolate the term with x x .

23x=13+23\frac{2}{3}x = \frac{1}{3} + \frac{2}{3}

Simplify the right side:

23x=33\frac{2}{3}x = \frac{3}{3}

33=1\frac{3}{3} = 1

So the equation becomes:

23x=1\frac{2}{3}x = 1

Step 3: Solve for x x by multiplying both sides by the reciprocal of 23\frac{2}{3}.

Multiply both sides by 32\frac{3}{2}:

x=1×32x = 1 \times \frac{3}{2}

Thus, the solution is:

x=32x = \frac{3}{2}

The solution to the problem is x=32 x = \frac{3}{2} .

Answer

32 \frac{3}{2}

Exercise #6

Solve for X:
49+35x=43 \frac{4}{9}+\frac{3}{5}x=\frac{4}{3}

Video Solution

Step-by-Step Solution

To solve the equation 49+35x=43 \frac{4}{9} + \frac{3}{5}x = \frac{4}{3} , we will follow these steps:

  • Step 1: Subtract 49 \frac{4}{9} from both sides to isolate the term involving x x .
  • Step 2: Divide by the coefficient of x x to solve for x x .

Step 1: Subtract 49 \frac{4}{9} from both sides:

35x=4349 \frac{3}{5}x = \frac{4}{3} - \frac{4}{9}

To subtract these fractions, find a common denominator. The least common denominator for 3 and 9 is 9. Rewrite 43 \frac{4}{3} as 129 \frac{12}{9} (since 4×3=12 4 \times 3 = 12), resulting in:

35x=12949=89 \frac{3}{5}x = \frac{12}{9} - \frac{4}{9} = \frac{8}{9}

Step 2: Divide both sides by 35 \frac{3}{5} to solve for x x :

x=89÷35=89×53 x = \frac{8}{9} \div \frac{3}{5} = \frac{8}{9} \times \frac{5}{3}

Multiply the fractions. The result is:

x=8×59×3=4027 x = \frac{8 \times 5}{9 \times 3} = \frac{40}{27}

Thus, the solution to the equation is x=4027 x = \frac{40}{27} .

Answer

4027 \frac{40}{27}

Exercise #7

Find the value of the parameter X

23x+14=34 \frac{2}{3}x+\frac{1}{4}=\frac{3}{4}

Video Solution

Step-by-Step Solution

Let's proceed with solving the equation step by step:

  1. Start with the equation 23x+14=34 \frac{2}{3}x + \frac{1}{4} = \frac{3}{4} .

  2. Subtract 14 \frac{1}{4} from both sides to remove the constant term on the left:
    23x+1414=3414 \frac{2}{3}x + \frac{1}{4} - \frac{1}{4} = \frac{3}{4} - \frac{1}{4} .

  3. This simplifies to: 23x=3414 \frac{2}{3}x = \frac{3}{4} - \frac{1}{4} .

  4. Perform the subtraction on the right-hand side:
    23x=24=12 \frac{2}{3}x = \frac{2}{4} = \frac{1}{2} .

  5. Now solve for x x by dividing both sides of the equation by 23 \frac{2}{3} :
    x=12÷23 x = \frac{1}{2} \div \frac{2}{3} .

  6. Dividing by a fraction is the same as multiplying by its reciprocal:
    x=12×32 x = \frac{1}{2} \times \frac{3}{2} .

  7. Simplify the multiplication:
    x=34 x = \frac{3}{4} .

Therefore, the value of the parameter x x is 34\frac{3}{4}.

Answer

34 \frac{3}{4}

Exercise #8

Find the value of the parameter X

8345x=210x \frac{8}{3}-\frac{4}{5}x=-\frac{2}{10}x

Video Solution

Step-by-Step Solution

To solve the equation 8345x=210x \frac{8}{3} - \frac{4}{5}x = -\frac{2}{10}x , follow these steps:

  • Step 1: Identify the least common denominator (LCD) of the fractions involved. The denominators are 3, 5, and 10, so the LCD is 30.
  • Step 2: Multiply the entire equation by 30 to eliminate the fractions:
    30×(8345x)=30×(210x) 30 \times \left(\frac{8}{3} - \frac{4}{5}x\right) = 30 \times \left(-\frac{2}{10}x\right)
  • Step 3: Simplify each term:
    For 83\frac{8}{3}: 30×83=10×8=8030 \times \frac{8}{3} = 10 \times 8 = 80
    For 45x\frac{4}{5}x: 30×45x=6×4x=24x30 \times \frac{4}{5}x = 6 \times 4x = 24x
    For 210x-\frac{2}{10}x: 30×210x=3×2x=6x30 \times -\frac{2}{10}x = 3 \times -2x = -6x
  • Step 4: Rewrite the equation:
    8024x=6x 80 - 24x = -6x
  • Step 5: Combine like terms by moving terms containing x x to one side:
    Subtract 6x-6x from both sides:
    80=18x 80 = 18x
  • Step 6: Solve for x x by dividing both sides by 18:
    x=8018=409 x = \frac{80}{18} = \frac{40}{9} after simplification.

Therefore, the solution to the problem is x=409 x = \frac{40}{9} .

Answer

409 \frac{40}{9}

Exercise #9

Solve for X:
45x+37=214 \frac{4}{5}x+\frac{3}{7}=\frac{2}{14}

Video Solution

Step-by-Step Solution

To solve the linear equation 45x+37=214 \frac{4}{5}x + \frac{3}{7} = \frac{2}{14} , we will follow these steps:

  • Step 1: Subtract 37 \frac{3}{7} from both sides of the equation to isolate the term with x x .
  • Step 2: Simplify the resulting equation.
  • Step 3: Solve for x x by multiplying both sides by the reciprocal of the coefficient of x x .

Now, let's work through the solution:

Step 1: Subtract 37 \frac{3}{7} from both sides:

45x=21437 \frac{4}{5}x = \frac{2}{14} - \frac{3}{7}

Step 2: Simplify the right side:

214 \frac{2}{14} can be simplified to 17 \frac{1}{7} , so the equation becomes:

45x=1737 \frac{4}{5}x = \frac{1}{7} - \frac{3}{7}

Simplifying the right side gives:

45x=27 \frac{4}{5}x = -\frac{2}{7}

Step 3: Solve for x x .

Multiply both sides by the reciprocal of 45 \frac{4}{5} , which is 54 \frac{5}{4} :

x=27×54 x = -\frac{2}{7} \times \frac{5}{4}

Perform the multiplication on the right side:

x=2×57×4=1028 x = -\frac{2 \times 5}{7 \times 4} = -\frac{10}{28}

Simplify 1028 -\frac{10}{28} by dividing the numerator and the denominator by their greatest common divisor, which is 2:

x=514 x = -\frac{5}{14}

Thus, the solution to the equation is x=514 x = -\frac{5}{14} .

Answer

514 -\frac{5}{14}

Exercise #10

Solve for X:

911815x=822 \frac{9}{11}-\frac{8}{15}x=\frac{8}{22}

Video Solution

Step-by-Step Solution

To solve the equation 911815x=822 \frac{9}{11} - \frac{8}{15}x = \frac{8}{22} , follow these steps:

  • Step 1: Find the least common denominator (LCD) of 11, 15, and 22, which is 330.
  • Step 2: Multiply every term in the equation by 330 to eliminate the fractions:
    330×911330×815x=330×822 330 \times \frac{9}{11} - 330 \times \frac{8}{15}x = 330 \times \frac{8}{22} .
  • Step 3: Simplify each term:
    - For 911 \frac{9}{11} : 330×911=270 330 \times \frac{9}{11} = 270 ,
    - For 815x \frac{8}{15}x : 330×815x=176x 330 \times \frac{8}{15}x = 176x ,
    - For 822 \frac{8}{22} : 330×822=120 330 \times \frac{8}{22} = 120 .
  • Step 4: Substitute back into the equation:
    270176x=120 270 - 176x = 120 .
  • Step 5: Isolate x x :
    - Subtract 270 from both sides: 176x=120270-176x = 120 - 270,
    - Simplify: 176x=150-176x = -150,
    - Divide both sides by 176-176: x=150176=7588x = \frac{-150}{-176} = \frac{75}{88}.

Thus, the value of x x is 7588 \frac{75}{88} .

Answer

7588 \frac{75}{88}