Solve -7*m + 1884 - 1898 = 0 for m.
Solve this plz.

A: -2

Solve 141*c + 131*c - 311*c = 195 for c.
Solve this plz.

A: -5

Solve -45*o - 66*o - 12*o + 615 = 0 for o.
Solve this plz.

A:
5