Solve 37*m = 8*m + 290 - 580 for m.
Solve this plz.

A: -10

Solve 301 = -80*r + 17*r - 455 for r.
Solve this plz.

A: -12

Solve -10 = -3*l + 5*l for l.
Solve this plz.

A:
-5