Question:
Solve 0 = 17*x - 7*x + 40 for x..

Answer:
-4

Question:
Solve -776*u + 470 + 5946 = -2896 for u..

Answer:
12

Question:
Solve 362*y - 448*y = 430 for y..

Answer:
-5

Question:
Solve 0 = 7*j - 4660 + 4667 for j..

Answer:
-1