Question:
Solve -30*f + 28*f = -10 for f..

Answer:
5

Question:
Solve 62 = -78*l - 1108 for l..

Answer:
-15

Question:
Solve -31*y - 101 = 9*y - 301 for y..

Answer:
5

Question:
Solve 24 = -469*s + 477*s for s..

Answer:
3