Solve 993*s - 3122*s - 3654 + 8610 + 5689 = 0 for s.
Solve this plz.

A: 5

Solve -80*y + 32*y - 29266 + 29170 = 0 for y.
Solve this plz.

A: -2

Solve 1 = -13*a + 40 for a.
Solve this plz.

A:
3