Problem: Math Problem
Solve 15*w = 46*w - w - 390 for w.

A: 13

Problem: Math Problem
Solve 24*s - 30 = 30*s for s.

A: -5

Problem: Math Problem
Solve -198*c - 213*c - 2120 - 5656 = -315*c for c.

A:
-81