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Solve the equation for all values of 
x.

|x+8|=3x
Answer: 
x=

Solve the equation for all values of x x .\newlinex+8=3x |x+8|=3 x \newlineAnswer: x= x=

Full solution

Q. Solve the equation for all values of x x .\newlinex+8=3x |x+8|=3 x \newlineAnswer: x= x=
  1. Absolute Value Equation Split: We have the equation x+8=3x|x+8|=3x. The absolute value equation can split into two separate equations, one for the positive case and one for the negative case.\newlineFor the positive case, we have:\newlinex+8=3xx + 8 = 3x
  2. Positive Case Solution: To solve for xx, we need to get all the xx terms on one side. Subtract xx from both sides of the equation:\newlinex+8x=3xxx + 8 - x = 3x - x\newline8=2x8 = 2x
  3. Negative Case Solution: Now, divide both sides by 22 to solve for xx:82=2x2\frac{8}{2} = \frac{2x}{2}4=x4 = x
  4. Positive Case Simplification: For the negative case, we have:\newline(x+8)=3x- (x + 8) = 3x\newlinex8=3x-x - 8 = 3x
  5. Positive Case Solution: To solve for xx, we need to get all the xx terms on one side. Add xx to both sides of the equation:\newlinex8+x=3x+x-x - 8 + x = 3x + x\newline8=4x-8 = 4x
  6. Negative Case Simplification: Now, divide both sides by 44 to solve for xx:8/4=4x/4-8 / 4 = 4x / 42=x-2 = x
  7. Negative Case Solution: We have found two potential solutions for the equation x+8=3x|x+8|=3x: x=4x = 4 and x=2x = -2. However, we must check these solutions to ensure they do not violate the original absolute value equation.
  8. Check x=4x = 4: Check x=4x = 4 in the original equation:\newline4+8=3×4|4 + 8| = 3 \times 4\newline12=12|12| = 12\newline12=1212 = 12 which is true.
  9. Check x=2x = -2: Check x=2x = -2 in the original equation:\newline2+8=3×2|-2 + 8| = 3 \times -2\newline6=6|6| = -6\newline666 \neq -6 which is false. Therefore, x=2x = -2 is not a solution.

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