Solve 0 = 54*x - 421 - 2112 + 319 for x.
Solve this plz.

A: 41

Solve 228*v = 139*v - 737*v - 17346 for v.
Solve this plz.

A: -21

Solve 0 = -615*o - 6919 - 3624 + 703 for o.
Solve this plz.

A:
-16