Solve -19*s + 47*s = -7*s - 665 for s.
Solve this plz.

A: -19

Solve -51 = -z - 48 for z.
Solve this plz.

A: 3

Solve -36783 - 19540 - 18204 = 4317*u + 11813 for u.
Solve this plz.

A:
-20