Q: What is the solution?
Solve 131*i = -1588 + 4077 for i.

A: 19

Q: What is the solution?
Solve -3 = 21*s + 56 + 25 for s.

A: -4

Q: What is the solution?
Solve 174*o = 409 + 1853 for o.

A:
13