Solve 165*u = 171*u - 30 for u.
Solve this plz.

A: 5

Solve -8785*f - 1417 = -9011*f - 12943 for f.
Solve this plz.

A: -51

Solve 32043 + 53511 = -1822*d + 14496 for d.
Solve this plz.

A:
-39