Q. Solve the equation for all values of x.∣2x+6∣=xAnswer: x=
Absolute Value Equation: We have the equation ∣2x+6∣=x. To solve this, we need to consider two cases because the absolute value function outputs the input value if it's non-negative, and the negation of the input value if it's negative.
Case 1 Solution: Case 1: If 2x+6 is non-negative, then ∣2x+6∣=2x+6. So we have the equation 2x+6=x. Now, we solve for x.Subtract x from both sides to get x+6=0.Subtract 6 from both sides to get x=−6.
Case 2 Solution: Case 2: If 2x+6 is negative, then ∣2x+6∣=−(2x+6). So we have the equation −(2x+6)=x. Now, we solve for x.Distribute the negative sign to get −2x−6=x.Add 2x to both sides to get −6=3x.Divide both sides by 3 to get x=−2.
Check Validity: We need to check if our solutions make the original equation true. For x=−6, substituting into the original equation gives ∣2(−6)+6∣=−6, which simplifies to ∣−12+6∣=−6, and further to ∣−6∣=−6. Since the absolute value of a number cannot be negative, x=−6 is not a valid solution.
Final Solution: For x=−2, substituting into the original equation gives ∣2(−2)+6∣=−2, which simplifies to ∣−4+6∣=−2, and further to ∣2∣=−2. Since the absolute value of a number cannot be negative, x=−2 is not a valid solution either.
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