Question:
Solve 0 = -28*b + 221 - 0 + 59 for b..

Answer:
10

Question:
Solve 13*k = 30*k + 108*k - 3585 - 915 for k..

Answer:
36

Question:
Solve -2 + 39 = -3*a - 2 for a..

Answer:
-13

Question:
Solve -27*s + 167 = -103 for s..

Answer:
10