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Solve the equation for all values of 
x.

|5x-9|+9=x
Answer: 
x=

Solve the equation for all values of x x .\newline5x9+9=x |5 x-9|+9=x \newlineAnswer: x= x=

Full solution

Q. Solve the equation for all values of x x .\newline5x9+9=x |5 x-9|+9=x \newlineAnswer: x= x=
  1. Consider Non-Negative Case: We have the equation 5x9+9=x|5x - 9| + 9 = x. To solve for xx, we need to consider two cases because the absolute value function a|a| equals aa if aa is non-negative and a-a if aa is negative.
  2. Simplify Non-Negative Case: First, let's consider the case where the expression inside the absolute value is non-negative, which means 5x905x - 9 \geq 0. In this case, the equation becomes 5x9+9=x5x - 9 + 9 = x.
  3. Subtract to Solve: Simplify the equation by combining like terms.\newline5x9+9=x5x - 9 + 9 = x\newline5x=x5x = x
  4. Divide to Isolate: Subtract xx from both sides to solve for xx.\newline5xx=xx5x - x = x - x\newline4x=04x = 0
  5. Consider Negative Case: Divide both sides by 44 to isolate xx.4x4=04\frac{4x}{4} = \frac{0}{4}x=0x = 0
  6. Simplify Negative Case: Now, let's consider the second case where the expression inside the absolute value is negative, which means 5x - 9 < 0. In this case, the equation becomes (5x9)+9=x-\left(5x - 9\right) + 9 = x.
  7. Add to Solve: Simplify the equation by distributing the negative sign and combining like terms.\newline(5x9)+9=x- (5x - 9) + 9 = x\newline5x+9+9=x-5x + 9 + 9 = x\newline5x+18=x-5x + 18 = x
  8. Divide to Isolate: Add 5x5x to both sides to solve for xx.\newline5x+5x+18=x+5x-5x + 5x + 18 = x + 5x\newline18=6x18 = 6x
  9. Check Solution: Divide both sides by 66 to isolate xx.186=6x6\frac{18}{6} = \frac{6x}{6}x=3x = 3
  10. Substitute x=0x=0: We need to check if our solutions satisfy the original equation. Let's substitute x=0x = 0 into the original equation.\newline5(0)9+9=0|5(0) - 9| + 9 = 0\newline9+9=0|-9| + 9 = 0\newline9+9=09 + 9 = 0\newlineThis does not hold true, so x=0x = 0 is not a solution.

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