Q: What is the solution?
Solve 2474 = -15457*o + 15623*o + 1706 - 7034 for o.

A: 47

Q: What is the solution?
Solve 19*c + 283 = 644 for c.

A: 19

Q: What is the solution?
Solve 5*x + 7 = 2 for x.

A:
-1