Solve 181*b + 931 + 3305 = -5900 for b.
Solve this plz.

A: -56

Solve -17*a - 43 = -a + 27*a for a.
Solve this plz.

A: -1

Solve 1377 = 172*s - 1680 - 1071 for s.
Solve this plz.

A:
24