Incorrect. First simplify the equation to isolate the absolute value expression. The solution of $\displaystyle{\left|{X}\right|}={a}\usepackage{cmbright}\Huge\$ is $\displaystyle{X}={a}\usepackage{cmbright}\Huge\$ or $\displaystyle{X}=-{a}\usepackage{cmbright}\Huge\$ , but only for positive values of a. If a is a negative number, there is no solution to the equation.