Solve 4080*o + 173881 - 31081 = 0 for o.
Solve this plz.

A: -35

Solve 19*r + 22*r + 29*r - 60*r = 0 for r.
Solve this plz.

A: 0

Solve 54233*w + 924 = 54189*w for w.
Solve this plz.

A:
-21