Q: What is the solution?
Solve 65*f + 167 = -2*f - 637 for f.

A: -12

Q: What is the solution?
Solve 69 = -173*q + 4891 + 195 for q.

A: 29

Q: What is the solution?
Solve -29*s + 23*s + 30 = 0 for s.

A:
5