Question:
Solve -7*w - 12*w - 19 = 0 for w..

Answer:
-1

Question:
Solve -55 = 335*k - 9770 for k..

Answer:
29

Question:
Solve -44*f - 38*f = 8*f - 1620 for f..

Answer:
18

Question:
Solve 0 = -48*z + 35*z for z..

Answer:
0