Question:
Solve -403*k - 172*k + 23400 = -107*k for k..

Answer:
50

Question:
Solve -700446*u + 58 = -700417*u for u..

Answer:
2

Question:
Solve -2*u = 37*u + 117 for u..

Answer:
-3

Question:
Solve 12*t + 9 = 3*t for t..

Answer:
-1