Answer
An absolute value equation of the form $|ax+b|=c$ will have two solutions when $\color{blue}c \color{blue}\gt \color{blue}0$.
Work Step by Step
An absolute value equation of the form $|ax+b|=c$ will have two solutions when $c\gt 0$.
For example:
$|2x+2|= 1$ has two solutions because:
$\\2x+2=1 \text{ or } 2x+2=-1
\\2x =1-2 \text{ or } 2x=-1-2
\\2x = -1 \text{ or }2x = -3
\\x=-\frac{1}{2} \text{ or } x=-\frac{3}{2}$