Solve -426*j - 45 = -435*j for j.
Solve this plz.

A: 5

Solve 19478 = -1712*o + 1753 - 10159 - 13204 for o.
Solve this plz.

A: -24

Solve -3*u + 21 = 42 for u.
Solve this plz.

A:
-7