Solve -90*c + 443*c - 3933 - 5245 = 0 for c.
Solve this plz.

A: 26

Solve 43*i = 58*i - 90 for i.
Solve this plz.

A: 6

Solve -26*f + 5*f - 21 = 0 for f.
Solve this plz.

A:
-1