Solve 53*j + 1429 - 623 = 700 for j.
Solve this plz.

A: -2

Solve 6997*u - 620*u - 102032 = 0 for u.
Solve this plz.

A: 16

Solve -4*r = 12 - 24 for r.
Solve this plz.

A:
3