Solve -292*f + 285*f + 83 = 6 for f.
Solve this plz.

A: 11

Solve 0 = -21*j - 27*j - 144 for j.
Solve this plz.

A: -3

Solve -18*z - 193 + 247 = 0 for z.
Solve this plz.

A:
3