Q: Solve:
Solve -280*r + 295*r = 405*r - 15990 for r.

A: 41

Q: Solve:
Solve 0 = -4220*h + 3323*h + 102258 for h.

A: 114

Q: Solve:
Solve -16923 - 15861 = -51*z - 632*z for z.

A:
48