Solve 5*f - 391*f - 22167 = 2923 for f.
Solve this plz.

A: -65

Solve 21*g = 6*g + 20 - 50 for g.
Solve this plz.

A: -2

Solve -118078576*y + 118078690*y - 9918 = 0 for y.
Solve this plz.

A:
87