Solve -417*f + 822 - 286 = -149*f for f.
Solve this plz.

A: 2

Solve 2*s = 12 - 4 for s.
Solve this plz.

A: 4

Solve -14*n + 27 + 519 = -26*n - 102 for n.
Solve this plz.

A:
-54