Question:
Solve 30*r + 228 = -27*r for r..

Answer:
-4

Question:
Solve -1720*p = -1718*p - 14 for p..

Answer:
7

Question:
Solve -28 = 4594*r - 4601*r for r..

Answer:
4

Question:
Solve -685*z + 6702 + 12834 = 536*z for z..

Answer:
16