Q. Solve the equation for all values of x.∣5x−9∣+9=xAnswer: x=
Consider Non-Negative Case: We have the equation ∣5x−9∣+9=x. To solve for x, we need to consider two cases because the absolute value function ∣a∣ equals a if a is non-negative and −a if a is negative.
Simplify Non-Negative Case: First, let's consider the case where the expression inside the absolute value is non-negative, which means 5x−9≥0. In this case, the equation becomes 5x−9+9=x.
Subtract to Solve: Simplify the equation by combining like terms.5x−9+9=x5x=x
Divide to Isolate: Subtract x from both sides to solve for x.5x−x=x−x4x=0
Consider Negative Case: Divide both sides by 4 to isolate x.44x=40x=0
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 −(5x−9)+9=x.
Add to Solve: Simplify the equation by distributing the negative sign and combining like terms.−(5x−9)+9=x−5x+9+9=x−5x+18=x
Divide to Isolate: Add 5x to both sides to solve for x.−5x+5x+18=x+5x18=6x
Check Solution: Divide both sides by 6 to isolate x.618=66xx=3
Substitute x=0: We need to check if our solutions satisfy the original equation. Let's substitute x=0 into the original equation.∣5(0)−9∣+9=0∣−9∣+9=09+9=0This does not hold true, so x=0 is not a solution.
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