Q: Solve:
Solve -631400 + 631031 = -9*n for n.

A: 41

Q: Solve:
Solve 0 = 5*t - 6*t - 5 for t.

A: -5

Q: Solve:
Solve -3654*v + 3556*v - 1666 = 0 for v.

A:
-17