Solve the Fractions Puzzle: Find X in 3/11 - 8/12x + 1/3x = 1/2 + 2/4 - 22/24x

Linear Equations with Mixed Fractions

Solve for X:

311812x+13x=12+242224x \frac{3}{11}-\frac{8}{12}x+\frac{1}{3}x=\frac{1}{2}+\frac{2}{4}-\frac{22}{24}x

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:00 Find X
00:04 Arrange the equation so that X is isolated on one side
00:25 Group like terms
00:36 Isolate X
00:53 Division by a fraction is multiplication by its reciprocal
00:57 Make sure to multiply numerator by numerator and denominator by denominator
01:07 And this is the solution to the problem

Step-by-step written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

Solve for X:

311812x+13x=12+242224x \frac{3}{11}-\frac{8}{12}x+\frac{1}{3}x=\frac{1}{2}+\frac{2}{4}-\frac{22}{24}x

2

Step-by-step solution

To solve this problem, let's break down the equation step-by-step:

Start with the original equation:

311812x+13x=12+242224x \frac{3}{11} - \frac{8}{12}x + \frac{1}{3}x = \frac{1}{2} + \frac{2}{4} - \frac{22}{24}x

Step 1: Simplify the fractions where possible.

  • 812=23 \frac{8}{12} = \frac{2}{3} : Simplifying 812x\frac{8}{12}x gives us:23x -\frac{2}{3}x
  • 24=12 \frac{2}{4} = \frac{1}{2}
  • 2224 \frac{22}{24} simplifies to 1112 \frac{11}{12} : So, 2224x-\frac{22}{24}x becomes 1112x-\frac{11}{12}x

The equation now looks like this:

31123x+13x=12+121112x \frac{3}{11} - \frac{2}{3}x + \frac{1}{3}x = \frac{1}{2} + \frac{1}{2} - \frac{11}{12}x

Step 2: Combine like terms.

  • 23x+13x=13x-\frac{2}{3}x + \frac{1}{3}x = -\frac{1}{3}x
  • 12+12=1\frac{1}{2} + \frac{1}{2} = 1

So, the equation simplifies to:

31113x=11112x \frac{3}{11} - \frac{1}{3}x = 1 - \frac{11}{12}x

Step 3: Move all terms involving x x to one side:

Add 13x\frac{1}{3}x to both sides:

311=11112x+13x \frac{3}{11} = 1 - \frac{11}{12}x + \frac{1}{3}x

Combine the terms with x x :

  • 1112x+13x=1112x+412x=712x-\frac{11}{12}x + \frac{1}{3}x = -\frac{11}{12}x + \frac{4}{12}x = -\frac{7}{12}x

Thus, the equation is:

311=1712x \frac{3}{11} = 1 - \frac{7}{12}x

Step 4: Isolate x x :

Subtract 1 from both sides:

3111=712x \frac{3}{11} - 1 = -\frac{7}{12}x

Convert 1-1 to a fraction with a common denominator to the left side:3111111=31111=811 \frac{3}{11} - \frac{11}{11} = \frac{3 - 11}{11} = -\frac{8}{11}

Now the equation is:

811=712x -\frac{8}{11} = -\frac{7}{12}x

Multiply both sides by the reciprocal of 712-\frac{7}{12} to solve for x x :

x=811127=812117=9677 x = -\frac{8}{11} \cdot -\frac{12}{7} = \frac{8 \cdot 12}{11 \cdot 7} = \frac{96}{77}

Thus, the solution to the equation is 9677\boxed{\frac{96}{77}}.

3

Final Answer

9677 \frac{96}{77}

Key Points to Remember

Essential concepts to master this topic
  • Simplification: Reduce all fractions to lowest terms before solving
  • Technique: Combine like terms: 23x+13x=13x -\frac{2}{3}x + \frac{1}{3}x = -\frac{1}{3}x
  • Check: Substitute x=9677 x = \frac{96}{77} back into original equation ✓

Common Mistakes

Avoid these frequent errors
  • Forgetting to simplify fractions before combining
    Don't leave fractions like 8/12 and 22/24 in original form = messy calculations! This leads to incorrect coefficients and wrong final answers. Always simplify fractions first: 8/12 = 2/3 and 22/24 = 11/12.

Practice Quiz

Test your knowledge with interactive questions

Solve for X:

\( x - 3 + 5 = 8 - 2 \)

FAQ

Everything you need to know about this question

Why do I need to simplify fractions at the beginning?

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Simplifying fractions like 812=23 \frac{8}{12} = \frac{2}{3} makes the math much easier! Working with smaller numbers reduces calculation errors and helps you see patterns more clearly.

How do I combine fractions with the same variable?

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When fractions have the same variable, combine the coefficients: 23x+13x=2+13x=13x -\frac{2}{3}x + \frac{1}{3}x = \frac{-2+1}{3}x = -\frac{1}{3}x . The variable stays the same!

What if I get confused moving terms to different sides?

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Use the opposite operation on both sides! To move 13x -\frac{1}{3}x from left to right, add +13x +\frac{1}{3}x to both sides.

How do I multiply by a reciprocal to solve for x?

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When you have 811=712x -\frac{8}{11} = -\frac{7}{12}x , multiply both sides by 127 -\frac{12}{7} (the reciprocal). The negatives cancel: x=8×1211×7=9677 x = \frac{8 \times 12}{11 \times 7} = \frac{96}{77}

Should I convert my answer to a decimal?

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Keep it as a fraction! 9677 \frac{96}{77} is the exact answer. Converting to decimal might introduce rounding errors. Always check if the fraction can be simplified further.

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