Solve -1157*i = -36*i + 63*i - 5920 for i.
Solve this plz.

A: 5

Solve -2 = 5*f - 7 for f.
Solve this plz.

A: 1

Solve -6 = 10*u - 7*u for u.
Solve this plz.

A:
-2