Q. Solve the equation for all values of x.∣4x+2∣−8=xAnswer: x=
Isolate absolute value: We have the equation ∣4x+2∣−8=x. To solve for x, we first need to isolate the absolute value expression on one side of the equation.Add 8 to both sides of the equation to isolate the absolute value.∣4x+2∣−8+8=x+8∣4x+2∣=x+8
Split into two equations: Now we have ∣4x+2∣=x+8. The absolute value equation can be split into two separate equations because the expression inside the absolute value can be either positive or negative.The two cases are:1. 4x+2=x+8 (when the expression inside the absolute value is positive or zero)2. 4x+2=−(x+8) (when the expression inside the absolute value is negative)
Solve first case: Solve the first case 4x+2=x+8.Subtract x from both sides:4x−x+2=x−x+83x+2=8Subtract 2 from both sides:3x+2−2=8−23x=6Divide both sides by 3:33x=36x=2
Solve second case: Solve the second case 4x+2=−(x+8). Distribute the negative sign on the right side: 4x+2=−x−8 Add x to both sides: 4x+x+2=−x+x−8 5x+2=−8 Subtract 2 from both sides: 5x+2−2=−8−2 5x=−10 Divide both sides by 5: 55x=5−10 4x+2=−x−80
Check solutions: We have found two potential solutions for the equation ∣4x+2∣−8=x: x=2 and x=−2. However, we must check these solutions in the original equation to ensure they do not create any contradictions, as sometimes absolute value equations can yield extraneous solutions.Check x=2:∣4(2)+2∣−8=2∣8+2∣−8=2∣10∣−8=210−8=22=2 (This is true, so x=2 is a valid solution.)Check x=−2:x=21x=22x=23x=24x=25 (This is true, so x=−2 is also a valid solution.)
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