Q: Solve:
Solve -42*s - 40 = -12*s + 110 for s.

A: -5

Q: Solve:
Solve -21*v + 55*v = 34 for v.

A: 1

Q: Solve:
Solve -11*c + 469 - 778 - 838 = -48*c for c.

A:
31