Solve 0 = -294*o + 9179 - 21527 for o.
Solve this plz.

A: -42

Solve 2325 = -457*h - 248*h - 1200 for h.
Solve this plz.

A: -5

Solve 42*s - 173*s = -393 for s.
Solve this plz.

A:
3