Question:
Solve -16*f = -9*f + 35 for f..

Answer:
-5

Question:
Solve -5*n - 2 = 3 for n..

Answer:
-1

Question:
Solve -360 = 116*a - 71*a for a..

Answer:
-8

Question:
Solve 77*f = 116*f for f..

Answer:
0