Q: Solve:
Solve 3782*f - 3725*f = -4275 for f.

A: -75

Q: Solve:
Solve 433*z - 247*z - 3502 - 4660 = 263*z for z.

A: -106

Q: Solve:
Solve -1387*u = -1566*u - 2327 for u.

A:
-13