Solve -7584*b + 7709*b = -2125 for b.
Solve this plz.

A: -17

Solve -564*w = -544*w - 240 for w.
Solve this plz.

A: 12

Solve -68*r - 92 = 212 + 36 for r.
Solve this plz.

A:
-5