Hello people I've got some problems to solve this equation
$$ |f(x)| - |g(x)| + |h(x)| = \begin{cases} -1 &\text{if } x < -1 \\ 3x + 2 &\text{if } -1 < x <0 \\ -2x + 2 &\text{if } x > 0 \end{cases} $$
I tried to solve the system but I'm stuck, so I'm counting on you for help me thanks.
PS: I'm looking for web ressources in order to improve myself in math if you have an idea do not heasitate.