Solve 31*f - 777 = 15*f - 5*f + 609 for f.
Solve this plz.

A: 66

Solve 0 = 24*i - 2*i + 88 for i.
Solve this plz.

A: -4

Solve 200 = -10*y + 200 for y.
Solve this plz.

A:
0