Q: What is the solution?
Solve -2 = 7*s - 5*s for s.

A: -1

Q: What is the solution?
Solve 4886 - 12359 = -876*y + 22759 + 9188 for y.

A: 45

Q: What is the solution?
Solve -420 - 84 = -64*o - 56 for o.

A:
7