Question:
Solve -8*o + o = 7 for o..

Answer:
-1

Question:
Solve -14*y - 10 = -19*y for y..

Answer:
2

Question:
Solve 0 = 30*w - 40*w for w..

Answer:
0

Question:
Solve 3*b + 83 = -6*b + 20 for b..

Answer:
-7