Q: Solve 4 = -5*s + 4 for s.

A: 0

Q: Solve -3051 + 501 = 85*v for v.

A: -30

Q: Solve 0 = 27*i + 203 + 40 for i.

A: -9

Q: Solve 0 = 16*p - 72 - 44 - 44 for p.

A:
10