Question:
Solve -6*o + 77 = -24*o - 139 for o..

Answer:
-12

Question:
Solve 8 = 50*o - 46*o for o..

Answer:
2

Question:
Solve 197*x - 89*x + 2184 = 82*x + 110*x for x..

Answer:
26

Question:
Solve 15 + 0 = -5*o for o..

Answer:
-3