Solve -23*j + 1988 = 12*j + 2268 for j.
Solve this plz.

A: -8

Solve 0 = 3*f - 25 + 31 for f.
Solve this plz.

A: -2

Solve 78*i - 474 = -1566 for i.
Solve this plz.

A:
-14