Question:
Solve -764 = 90*f - 276 - 2018 for f..

Answer:
17

Question:
Solve 4*n + 27 = 13*n for n..

Answer:
3

Question:
Solve 18*m + 4*m - 102 + 234 = 0 for m..

Answer:
-6

Question:
Solve 217*f + 535*f - 49368 = -143*f + 169*f for f..

Answer:
68