Solve 423 + 1996 = -76*b + 49*b - 14*b for b.
Solve this plz.

A: -59

Solve 709*u + 33*u - 3249 = -182*u + 43875 for u.
Solve this plz.

A: 51

Solve -42*i = 3*i + 135 for i.
Solve this plz.

A:
-3