Solve the Linear Equation: Break Down -1/2(1/4x + 1/6) = 1/4(1/2x + 1/3)

Question

Solve for X:

12(14x+16)=14(12x+13) -\frac{1}{2}(\frac{1}{4}x+\frac{1}{6})=\frac{1}{4}(\frac{1}{2}x+\frac{1}{3})

Video Solution

Solution Steps

00:00 Solve
00:04 Open brackets properly, multiply by each factor
00:23 Arrange the equation so that X is isolated on one side
00:51 Collect like terms
00:57 Isolate X
01:07 Simplify what's possible
01:11 Factor 8 into 4 and 2
01:16 Factor 12 into 4 and 3
01:19 Simplify what's possible, and substitute
01:23 And this is the solution to the question

Step-by-Step Solution

To solve the equation 12(14x+16)=14(12x+13) -\frac{1}{2}\left(\frac{1}{4}x + \frac{1}{6}\right) = \frac{1}{4}\left(\frac{1}{2}x + \frac{1}{3}\right) , follow these steps:

  • Step 1: Distribute the Factors
    Distribute 12-\frac{1}{2} on the left-hand side:
    12×14x=18x-\frac{1}{2} \times \frac{1}{4}x = -\frac{1}{8}x and 12×16=112-\frac{1}{2} \times \frac{1}{6} = -\frac{1}{12}
    This gives us: 18x112 -\frac{1}{8}x - \frac{1}{12} .
  • Step 2: Do the same for the right-hand side, multiplying by 14\frac{1}{4}:
    14×12x=18x\frac{1}{4} \times \frac{1}{2}x = \frac{1}{8}x and 14×13=112\frac{1}{4} \times \frac{1}{3} = \frac{1}{12}
    This results in: 18x+112\frac{1}{8}x + \frac{1}{12}.
  • Step 3: Combine Results
    We equate the distributed expressions:
    18x112=18x+112-\frac{1}{8}x - \frac{1}{12} = \frac{1}{8}x + \frac{1}{12}.
  • Step 4: Clear the Fractions
    Multiply every term by the LCM of 8 and 12, which is 24:
    24(18x)24(112)=24(18x)+24(112)24\left(-\frac{1}{8}x\right) - 24\left(\frac{1}{12}\right) = 24\left(\frac{1}{8}x\right) + 24\left(\frac{1}{12}\right)
    This simplifies to: 3x2=3x+2-3x - 2 = 3x + 2.
  • Step 5: Solve the Equation
    Move all xx terms to one side and constants to the other:
    3x3x=2+2-3x - 3x = 2 + 2
    6x=4-6x = 4
  • Step 6: Solve for xx
    Divide both sides by -6:
    x=46=23x = \frac{4}{-6} = -\frac{2}{3}

Therefore, the solution to the problem is x=23 x = -\frac{2}{3} , which corresponds to Choice 1.

Answer

23 -\frac{2}{3}