Question:
Solve 531*v - 42537 - 22775 = -161*v - 564*v for v..

Answer:
52

Question:
Solve 0 = 1959*b - 1950*b - 90 for b..

Answer:
10

Question:
Solve -49*x = 11*x + 510 + 2670 for x..

Answer:
-53

Question:
Solve 4 = -8*b - 36 for b..

Answer:
-5