Question:
Solve 2*k = -k for k..

Answer:
0

Question:
Solve 355 - 411 = 7*x for x..

Answer:
-8

Question:
Solve -6*y - 24 - 12 + 204 = 0 for y..

Answer:
28

Question:
Solve -1097*w - 5938 - 415 = 422*w + 7318 for w..

Answer:
-9