Solve -15570 = -731*q + 243*q - 550*q for q.
Solve this plz.

A: 15

Solve -183*m + 89*m + 576 = -110*m for m.
Solve this plz.

A: -36

Solve 1786 + 76 + 618 = -80*r for r.
Solve this plz.

A:
-31