Question:
Solve -5763 = -13*o - 5685 for o..

Answer:
6

Question:
Solve -7*c - 27 = -6 for c..

Answer:
-3

Question:
Solve 45*f = -81*f + 126 for f..

Answer:
1

Question:
Solve -2*h + 5719 = 5729 for h..

Answer:
-5