Solve 113*u + 75562 = 61663 for u.
Solve this plz.

A: -123

Solve 0 = 22*k - 93*k - 781 for k.
Solve this plz.

A: -11

Solve -7210 - 23578 = 253*f + 105*f for f.
Solve this plz.

A:
-86