Solve 8*m - 351 = -431 for m.
Solve this plz.

A: -10

Solve 197100 = -2938*n + 310*n for n.
Solve this plz.

A: -75

Solve -42*n + 77*n - 90 = 44*n for n.
Solve this plz.

A:
-10