Question:
Solve 306*x + 85*x + 26514 = -100*x for x..

Answer:
-54

Question:
Solve -47 = -10*u - 9*u + 162 for u..

Answer:
11

Question:
Solve 160 = -40*b + 1159*b - 54671 for b..

Answer:
49

Question:
Solve 7281*r - 7304*r + 2990 = 0 for r..

Answer:
130