Question:
Solve 2*x - 17 + 11 = 0 for x..

Answer:
3

Question:
Solve 67*k = 71*k + 28 for k..

Answer:
-7

Question:
Solve -1143*l - 577*l - 122120 = 0 for l..

Answer:
-71

Question:
Solve 7 - 27 = -10*u for u..

Answer:
2