Q: Solve -23 + 29 = -9*f - 57 for f.

A: -7

Q: Solve -15 = 159*w - 162*w for w.

A: 5

Q: Solve 0 = 29*b + 152 + 22 for b.

A: -6

Q: Solve -143 = -39*o - 484 - 400 for o.

A:
-19