Question:
Solve 10280*n - 10271*n = 144 for n..

Answer:
16

Question:
Solve 228*x + 190 = 4978 for x..

Answer:
21

Question:
Solve 12*x = -6 - 54 for x..

Answer:
-5

Question:
Solve -686*r + 30 = 362*r + 1083*r - 2101 for r..

Answer:
1