Solve the Equation: -8(2-x) = 1/2 + x

Question

Solve for X:

8(2x)=12+x -8(2-x)=\frac{1}{2}+x

Video Solution

Solution Steps

00:00 Solution
00:03 Open brackets properly, multiply by each factor
00:15 Arrange the equation so that only the unknown X is on one side
00:35 Collect terms
00:40 Multiply by the reciprocal fraction to isolate X
00:52 Simplify as much as possible
00:55 Make sure to multiply numerator by numerator and denominator by denominator
00:59 And this is the solution to the question

Step-by-Step Solution

To solve the equation 8(2x)=12+x -8(2-x) = \frac{1}{2} + x , we will follow these detailed steps:

  • Step 1: Distribute the 8-8 to both terms inside the parentheses:
    8(2x)=8×2+(8)×(x)=16+8x -8(2-x) = -8 \times 2 + (-8) \times (-x) = -16 + 8x .
  • Step 2: Rewrite the equation from our distribution:
    16+8x=12+x -16 + 8x = \frac{1}{2} + x .
  • Step 3: Move all x x -terms to one side and constants to the other. Subtract x x from both sides:
    8xx=12+16 8x - x = \frac{1}{2} + 16 .
  • Step 4: Simplify both sides:
    7x=12+16 7x = \frac{1}{2} + 16 .
  • Step 5: Combine like terms on the right side:
    Convert 16 16 to an equivalent fraction of 322\frac{32}{2} so we can sum with 12\frac{1}{2}:
    7x=12+322=332 7x = \frac{1}{2} + \frac{32}{2} = \frac{33}{2} .
  • Step 6: Solve for x x by dividing by 7:
    x=332×17=3314 x = \frac{33}{2} \times \frac{1}{7} = \frac{33}{14} .

Therefore, the solution to the equation is x=3314 x = \frac{33}{14} .

The choice : 3314 \frac{33}{14}

matches our solution.

Answer

3314 \frac{33}{14}