Question:
Solve -15*a - 3 - 117 = 0 for a..

Answer:
-8

Question:
Solve 114*o = 43*o - 104*o + 3850 for o..

Answer:
22

Question:
Solve 5571*x - 155*x + 100643 + 259582 = -45975 for x..

Answer:
-75

Question:
Solve -5*u = -6 - 9 for u..

Answer:
3