Solve 1420*u - 1987985 = -22189*u + 1842142 - 808175 for u.
Solve this plz.

A: 128

Solve 8159*i - 8256*i - 107 = -3308 for i.
Solve this plz.

A: 33

Solve 26*f - 617 - 175 = 14 for f.
Solve this plz.

A:
31