Solve 13799*c - 3518 = 13918*c + 3384 for c.
Solve this plz.

A: -58

Solve 578 = -14*y + 1143 - 649 for y.
Solve this plz.

A: -6

Solve -22*o - 28*o = 246*o + 69*o + 7665 for o.
Solve this plz.

A:
-21