Question:
Solve 9*a + 17 = 53 for a..

Answer:
4

Question:
Solve -9*w + 2*w = 0 for w..

Answer:
0

Question:
Solve 400179 - 548951 = -5613*v - 1058*v + 631735 for v..

Answer:
117

Question:
Solve 93*w + 1638 = -33*w for w..

Answer:
-13