Solve 866 = 56*x + 2266 for x.
Solve this plz.

A: -25

Solve -6977 = -1344*y + 49303 - 9691 + 46147 for y.
Solve this plz.

A: 69

Solve -34*s - 870 = -1550 for s.
Solve this plz.

A:
20