Question:
Solve 0 = -77*o + 82*o + 10 for o..

Answer:
-2

Question:
Solve -2*l - l - 2*l = 0 for l..

Answer:
0

Question:
Solve 8738*f + 263590 = 2608*f for f..

Answer:
-43

Question:
Solve -77*i - 5 = -72*i for i..

Answer:
-1