Solve 120*h - 67*h = -90*h - 4862 for h.
Solve this plz.

A: -34

Solve -814 + 840 = 18*o - 5*o for o.
Solve this plz.

A: 2

Solve 1904*b - 314901 = -1039*b for b.
Solve this plz.

A:
107