Solve -122*s + 620*s - 4910 + 13376 = 0 for s.
Solve this plz.

A: -17

Solve 15*c - 19 = -4*c for c.
Solve this plz.

A: 1

Solve 56*n - 57*n = 3 for n.
Solve this plz.

A:
-3