Let

\(f(x) = \left\{ \begin{array}{cl} 2x + 1 & \text{if } x \le 3, \\ 8 - 4x & \text{if } x > 3. \end{array} \right.\)

Find the sum of all values of $x$ such that $f(x) = 0.$

I tried to do some guess and check (it worked on another problem i did similar to this) but it didn't really work...

AnimalMaster Jun 19, 2020