Solve -144*c = -31*c + 55*c - 2520 for c.
Solve this plz.

A: 15

Solve 202*d - 732 = -254*d + 517*d for d.
Solve this plz.

A: -12

Solve -264*j + 704 = -220*j for j.
Solve this plz.

A:
16