Question:
Solve 11*w + 91*w = -15*w + 1521 for w..

Answer:
13

Question:
Solve 6*w = -373 + 415 for w..

Answer:
7

Question:
Solve 0 = 3*f + 2*f - 2*f for f..

Answer:
0

Question:
Solve 965*t = -198*t - 1153 - 10 for t..

Answer:
-1