Solve 68*n - 2 = 70*n for n.
Solve this plz.

A: -1

Solve -91*n - 144*n + 215 = -20 for n.
Solve this plz.

A: 1

Solve 97*s + 202568 - 204702 = 0 for s.
Solve this plz.

A:
22