Question:
Solve -56*f + 61*f + 46*f + 459 = 0 for f..

Answer:
-9

Question:
Solve -59*a - 509 = -155 for a..

Answer:
-6

Question:
Solve 297 - 242 = 28*f + 1147 for f..

Answer:
-39

Question:
Solve -164*l + 42 = -195*l - 578 for l..

Answer:
-20