Solve -6*a + 4525 = 4471 for a.
Solve this plz.

A: 9

Solve -114*u + 0*u + 33*u - 1134 = 0 for u.
Solve this plz.

A: -14

Solve -84*o + 90*o = 24 for o.
Solve this plz.

A:
4