Q: What is the solution?
Solve -10*r = -33 + 3 for r.

A: 3

Q: What is the solution?
Solve 1888166 - 1890233 = -39*n for n.

A: 53

Q: What is the solution?
Solve 1125 = -217*s + 269*s + 3569 for s.

A:
-47