Question:
Solve 1 - 37 = -9*v for v..

Answer:
4

Question:
Solve -41 = -8*r + 7 for r..

Answer:
6

Question:
Solve -15*b + 21 = 21 for b..

Answer:
0

Question:
Solve 0 = -3445*m - 489*m - 62944 for m..

Answer:
-16