Q: Solve 131*v - 69 = 455 for v.

A: 4

Q: Solve 0 = 4*z - 229 + 249 for z.

A: -5

Q: Solve 3*u - 6 + 32 = -10*u for u.

A: -2

Q: Solve -69*f = -554*f + 975 + 32005 for f.

A:
68