Question:
Solve -646 = 86*p - 156 + 456 for p..

Answer:
-11

Question:
Solve -17*o + 85*o = -136 for o..

Answer:
-2

Question:
Solve -18*f + 283*f + 715 = -345 for f..

Answer:
-4

Question:
Solve 13*g - 22 = -48 for g..

Answer:
-2