Question:
Solve 864 = 335*v - 479*v for v..

Answer:
-6

Question:
Solve 369 - 1584 = -135*l for l..

Answer:
9

Question:
Solve 20343 = 8481*a - 156001 + 25976 - 10771 for a..

Answer:
19

Question:
Solve -10*a - 8 = -38 for a..

Answer:
3