Solve 0 = -32*m + 388618 - 388906 for m.
Solve this plz.

A: -9

Solve -369 = 9*r + 2*r - 182 for r.
Solve this plz.

A: -17

Solve 778*a - 145*a - 54303 = -507*a - 1221*a for a.
Solve this plz.

A:
23