Question:
Solve 1507*f - 920 = 1461*f for f..

Answer:
20

Question:
Solve -280 = 9780*j - 9752*j for j..

Answer:
-10

Question:
Solve 26*b + 105*b = 70*b + 3599 for b..

Answer:
59

Question:
Solve -54*y - 55 = -163 for y..

Answer:
2