Question:
Solve 1897 - 1883 = 2*b for b..

Answer:
7

Question:
Solve 152*s - 149*s - 12 = 0 for s..

Answer:
4

Question:
Solve 0 = 28*m - 25*m for m..

Answer:
0

Question:
Solve -635*y + 15020 = 116*y for y..

Answer:
20