Q: Solve:
Solve -10 = -93*c + 83*c for c.

A: 1

Q: Solve:
Solve 383*c - 21916 = 85*c + 18813 - 9737 for c.

A: 104

Q: Solve:
Solve -142 = 2*r - 144 for r.

A:
1