Q: Solve:
Solve -10*t + 16 = 85 - 39 for t.

A: -3

Q: Solve:
Solve -5969*o - 6464*o + 749632 = -720*o for o.

A: 64

Q: Solve:
Solve -40 = 9*r - 40 for r.

A:
0