Q. Solve the equation for all values of x.∣2x+1∣−8=xAnswer: x=
Consider Non-Negative Case: We have the equation ∣2x+1∣−8=x. To solve for x, we need to consider two cases because of the absolute value: one where 2x+1 is non-negative and one where 2x+1 is negative.
Simplify Non-Negative Case: First, let's consider the case where 2x+1 is non-negative. In this case, the absolute value expression ∣2x+1∣ is just 2x+1. So the equation becomes:2x+1−8=x
Isolate Variable (Non-Negative): Simplify the equation by subtracting 1 and adding 8 to both sides:2x+1−8=x2x−7=x
Add 7 (Non-Negative): Now, subtract x from both sides to isolate the variable:2x−7−x=x−xx−7=0
Consider Negative Case: Add 7 to both sides to solve for x: x−7+7=0+7x=7This is the solution for the case where 2x+1 is non-negative.
Distribute Negative Sign: Now, let's consider the case where 2x+1 is negative. In this case, the absolute value expression ∣2x+1∣ is −(2x+1). So the equation becomes:−(2x+1)−8=x
Combine Like Terms: Distribute the negative sign inside the parentheses: −2x−1−8=x
Isolate Variable (Negative): Combine like terms by adding 1 and 8 to both sides:−2x−1−8+1+8=x+1+8−2x=x+9
Subtract 9: Add 2x to both sides to isolate the variable:−2x+2x=x+9+2x0=3x+9
Divide by 3: Subtract 9 from both sides to solve for x: 0−9=3x+9−9−9=3x
Divide by 3: Subtract 9 from both sides to solve for x: 0−9=3x+9−9−9=3xDivide both sides by 3 to find the value of x: −39=33x−3=xThis is the solution for the case where 2x+1 is negative.
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