Q: Solve:
Solve 452*r = 166*r - 407*r - 10395 for r.

A: -15

Q: Solve:
Solve -341*z = -618*z - 128 - 149 for z.

A: -1

Q: Solve:
Solve 34*h + 365 - 534 = 749 for h.

A:
27