Q: Solve -156*o = -157*o + 6 for o.

A: 6

Q: Solve 13*a - 105*a = 768 + 244 for a.

A: -11

Q: Solve 4556818*y - 4556522*y + 23680 = 0 for y.

A: -80

Q: Solve 0 = -170*r + 174*r + 16 for r.

A:
-4