Solve -f + 11 - 7 = 0 for f.
Solve this plz.

A: 4

Solve 0 = -90*c - 1530 - 1244 - 1219 + 4623 for c.
Solve this plz.

A: 7

Solve 3*i = 7*i + i for i.
Solve this plz.

A:
0