Question:
Solve 10*v - 3 = 27 for v..

Answer:
3

Question:
Solve 87 = 17*w + 155 for w..

Answer:
-4

Question:
Solve 65*a - 68*a - 78*a = 92*a + 6574 for a..

Answer:
-38

Question:
Solve 22*b = 39*b - 17 for b..

Answer:
1