Question:
Solve -89 = -62*f + 151*f for f..

Answer:
-1

Question:
Solve 0 = -27802*w + 27899*w - 1261 for w..

Answer:
13

Question:
Solve -5120*f + 57226 + 202298 = -1916*f for f..

Answer:
81

Question:
Solve 226*f + 69*f = 86*f - 194845 + 202369 for f..

Answer:
36