Solve 136*l + 112*l = 43*l - 4715 for l.
Solve this plz.

A: -23

Solve -5 = 5*z + 20 for z.
Solve this plz.

A: -5

Solve 18*o - 21*o + 9 = 0 for o.
Solve this plz.

A:
3