Question:
Solve -5487 = -3350*b - 3409*b + 6666*b for b..

Answer:
59

Question:
Solve 62*a - 153*a - 3080 = 217*a for a..

Answer:
-10

Question:
Solve 131*x - 588 = -16*x for x..

Answer:
4

Question:
Solve s = -5 + 5 for s..

Answer:
0