Q: Solve 7*d = -189 + 231 for d.

A: 6

Q: Solve 196935*u = 196817*u - 4484 for u.

A: -38

Q: Solve 40*u + 95 = -225 for u.

A: -8

Q: Solve 0 = 232*b + 791 + 6865 for b.

A:
-33