Question:
Solve 0 = -17*b + 625 - 897 for b..

Answer:
-16

Question:
Solve -1686*x + 189 = -1665*x for x..

Answer:
9

Question:
Solve -775*u = 164*u - 6573 for u..

Answer:
7

Question:
Solve 0 = 27*c - 25*c + 6 for c..

Answer:
-3