Solve 0 = 18*d + 1536 - 1680 for d.
Solve this plz.

A: 8

Solve 13*m + 7*m = 45*m + 50 for m.
Solve this plz.

A: -2

Solve 16 = -3*u + 1 for u.
Solve this plz.

A:
-5