Question:
Solve 40*u - 7572 = -7852 for u..

Answer:
-7

Question:
Solve -40852 = -1274*o - 179718 for o..

Answer:
-109

Question:
Solve -50*n - 79*n - 6 + 135 = 0 for n..

Answer:
1

Question:
Solve -17*a - 149 = 9*a - 1189 for a..

Answer:
40