Question:
Solve -4*w - 3242 + 3424 = 9*w for w..

Answer:
14

Question:
Solve 2*d - 1789 + 1769 = 0 for d..

Answer:
10

Question:
Solve -13*f - 2464 = 128*f + 13*f for f..

Answer:
-16

Question:
Solve 7*f + 45 = -4*f + 16*f for f..

Answer:
9