Q: Solve:
Solve -121*m = 109*m + 13*m - 1944 for m.

A: 8

Q: Solve:
Solve 80*n + 111*n + 128 = 31*n - 32 for n.

A: -1

Q: Solve:
Solve 62882*r + 5069 = 63019*r for r.

A:
37