Q: Solve:
Solve -25*c - 4 = 12 + 9 for c.

A: -1

Q: Solve:
Solve 1019 = -340*m + 220*m - 4021 for m.

A: -42

Q: Solve:
Solve -6*h + 4*h - 6 = 0 for h.

A:
-3