Question:
Solve -9*b + 2*b + 28 = 0 for b..

Answer:
4

Question:
Solve 3*a + 156 = 144 for a..

Answer:
-4

Question:
Solve -941*w = -950*w + 27 for w..

Answer:
3

Question:
Solve -18*d = -8*d for d..

Answer:
0