Q: Solve:
Solve 0 = -3572*r + 11060*r - 314496 for r.

A: 42

Q: Solve:
Solve -451*l + 83*l - 9086 = 230*l + 700*l for l.

A: -7

Q: Solve:
Solve 53 = -13*h + 1 for h.

A:
-4