Question:
Solve 511*z = 503*z + 104 for z..

Answer:
13

Question:
Solve -532 = -8*b + 84*b for b..

Answer:
-7

Question:
Solve -170 = -103*h + 36 for h..

Answer:
2

Question:
Solve -145*i + 396 = -112*i for i..

Answer:
12