Question:
Solve 139*u + 410 = -134*u + 68*u for u..

Answer:
-2

Question:
Solve -850*i = 157*i + 599*i + 1380*i + 50762 for i..

Answer:
-17

Question:
Solve 11*r = 11 - 0 for r..

Answer:
1

Question:
Solve 7*r = 36*r for r..

Answer:
0