Question:
Solve 1361*u = 704*u + 5081*u - 256592 for u..

Answer:
58

Question:
Solve 430*r - 22106 = 828*r + 520*r + 661*r for r..

Answer:
-14

Question:
Solve -92*x + 15333 - 12389 = 0 for x..

Answer:
32

Question:
Solve -1 = 4*d - 9 for d..

Answer:
2