Solve 53*z - 20766 + 10515 = -10675 for z.
Solve this plz.

A: -8

Solve 320 = -5*f + 285 for f.
Solve this plz.

A: -7

Solve 1848*c - 3003 - 11781 = 0 for c.
Solve this plz.

A:
8