Solve -7*w = -9*w for w.
Solve this plz.

A: 0

Solve -12230 = -42*w - 11726 for w.
Solve this plz.

A: 12

Solve 37*z - 37*z + 60*z + 300 = 0 for z.
Solve this plz.

A:
-5