Q: Solve 0 = -23*u + 156 - 1 + 29 for u.

A: 8

Q: Solve -7*p - 5*p + 13*p = 0 for p.

A: 0

Q: Solve -2591*c - 8681 = -77646 - 11356 for c.

A: 31

Q: Solve -15*z - 18*z + 43*z - 140 = 0 for z.

A:
14