Question:
Solve 40 = 5*y + 3*y for y..

Answer:
5

Question:
Solve 885*z - 440 = 830*z for z..

Answer:
8

Question:
Solve 11*p - 30*p = -23*p for p..

Answer:
0

Question:
Solve 2199 = 211*o + 300 for o..

Answer:
9