Question:
Solve 11*w - 16*w = 20 for w..

Answer:
-4

Question:
Solve -70*x - 19*x + 31*x - 1508 = 0 for x..

Answer:
-26

Question:
Solve -608 = 10*k - 398 for k..

Answer:
-21

Question:
Solve -779*u + 5266 = -11093 for u..

Answer:
21