Solve 78*j = -322 - 390 + 10 for j.
Solve this plz.

A: -9

Solve 4*u = -35236 + 35248 for u.
Solve this plz.

A: 3

Solve -16*r + 19*r + 24 = 0 for r.
Solve this plz.

A:
-8