Q: What is the solution?
Solve 4*c - 5102 = -5138 for c.

A: -9

Q: What is the solution?
Solve 40676 - 24611 = -105*r for r.

A: -153

Q: What is the solution?
Solve 28*s - 56 - 1 = 251 for s.

A:
11