Solve 331*r - 1768 = 762*r - 379*r for r.
Solve this plz.

A: -34

Solve -715*f - 396*f = -279*f + 7935 + 30337 for f.
Solve this plz.

A: -46

Solve -8803*w = 344961 + 491324 for w.
Solve this plz.

A:
-95