Q: Solve:
Solve -14741 = 38*v + 31*v - 2*v - 11525 for v.

A: -48

Q: Solve:
Solve -21*r + 7*r = -9*r for r.

A: 0

Q: Solve:
Solve -16*o = 6*o + 66 for o.

A:
-3