Solve -2938389*f = -2938472*f + 5644 for f.
Solve this plz.

A: 68

Solve 23*j + 24 = 2*j + 3 for j.
Solve this plz.

A: -1

Solve 1305 - 268 = -21*m - 40*m for m.
Solve this plz.

A:
-17