Solve 0 = 72*a - 64*a + 8 for a.
Solve this plz.

A: -1

Solve 15668 = -x + 15669 for x.
Solve this plz.

A: 1

Solve -22*o + 555 - 665 = 0 for o.
Solve this plz.

A:
-5