Question:
Solve 4158*v = 3929*v + 3664 for v..

Answer:
16

Question:
Solve 245*n - 21423 - 24721 = -1403*n for n..

Answer:
28

Question:
Solve -1 + 1 = 12*s for s..

Answer:
0

Question:
Solve 45*y = 87 + 93 for y..

Answer:
4