Q: What is the solution?
Solve 263*u = 218655 - 229701 for u.

A: -42

Q: What is the solution?
Solve -45 = -2*s - 6*s + 11 for s.

A: 7

Q: What is the solution?
Solve 312*s + 99 + 331 = 742*s for s.

A:
1