Q: What is the solution?
Solve 277*z - 136*z - 9 = 138*z for z.

A: 3

Q: What is the solution?
Solve -4940*c + 64035 = -79225 for c.

A: 29

Q: What is the solution?
Solve -19*s = -7*s + 72 for s.

A:
-6