Solve 13*c + 27*c + 40 = 0 for c.
Solve this plz.

A: -1

Solve 3754 = -843*s - 2147 for s.
Solve this plz.

A: -7

Solve -6835*o = 307584 - 222795 + 462011 for o.
Solve this plz.

A:
-80