Solving Absolute Value Equation: |-x+6| = |3x-2|

Question

x+6=3x2 |-x+6|=|3x-2|

Video Solution

Step-by-Step Solution

To solve the problem, follow these steps:

  • Case 1: Set x+6=3x2-x + 6 = 3x - 2.
  • Simplify and solve for xx:

x+6=3x2-x + 6 = 3x - 2
Add xx to both sides: 6=4x26 = 4x - 2
Add 2 to both sides: 8=4x8 = 4x
Divide both sides by 4: x=2x = 2

  • Case 2: Set x+6=(3x2)-x + 6 = -(3x - 2), which is x+6=3x+2-x + 6 = -3x + 2.
  • Simplify and solve for xx:

x+6=3x+2-x + 6 = -3x + 2
Add 3x3x to both sides: 2x+6=22x + 6 = 2
Subtract 6 from both sides: 2x=42x = -4
Divide both sides by 2: x=2x = -2

Finally, verify that both solutions satisfy the original absolute value equation:

  • When x=2x = 2: 2+6=624=4|-2 + 6| = |6 - 2| \Rightarrow |4| = |4|, which holds true.
  • When x=2x = -2: 2+6=628=8|2 + 6| = |-6 - 2| \Rightarrow |8| = |8|, which holds true.

Thus, both x=2x = 2 and x=2x = -2 are valid solutions to the equation.

The solutions to the problem are x=2\boldsymbol{x=-2} and x=2\boldsymbol{x=2}.

Therefore, the correct answer choice is x=2\boldsymbol{x=-2} , x=2\boldsymbol{x=2}.

Answer

x=2 x=-2 , x=2 x=2