Solve 4283 = 528*r - 9147 - 1882 for r.
Solve this plz.

A: 29

Solve 23*z - 20*z = -9 for z.
Solve this plz.

A: -3

Solve -1235*u - 33337 = 43233 for u.
Solve this plz.

A:
-62