Solve 0 = 5*w - 50 + 60 for w.
Solve this plz.

A: -2

Solve -6399 + 181630 = 4737*f - 194255 for f.
Solve this plz.

A: 78

Solve 0 = -26*a - a - 189 for a.
Solve this plz.

A:
-7