Solve -681*m = -518*m + 345 + 144 for m.
Solve this plz.

A: -3

Solve 0*w + 1215*w = -6294 - 26479 - 31622 for w.
Solve this plz.

A: -53

Solve 23*z + 10 = 21*z for z.
Solve this plz.

A:
-5