Solve 314*o - 25*o - 87*o - 198858 = 1643*o for o.
Solve this plz.

A: -138

Solve -628 - 316 = 84*y - 486 + 802 for y.
Solve this plz.

A: -15

Solve 45*f - 4*f - 41 = 0 for f.
Solve this plz.

A:
1