Question:
Solve -1455*w + 1421*w + 272 = 0 for w..

Answer:
8

Question:
Solve 0 = -141*f - 47*f - 1880 for f..

Answer:
-10

Question:
Solve -10*c = 13 - 43 for c..

Answer:
3

Question:
Solve -6*w + 6*w = 6*w for w..

Answer:
0