Q: Solve:
Solve 0 = 30*h + 47 - 17 for h.

A: -1

Q: Solve:
Solve 239850 = -6642*m - 6683*m for m.

A: -18

Q: Solve:
Solve 242*o + 501*o = -207*o + 26600 for o.

A:
28