Question:
Solve -55*u + 41*u - 42 = 0 for u..

Answer:
-3

Question:
Solve 5*w + 841 - 811 = 0 for w..

Answer:
-6

Question:
Solve -280*x + 28*x + 18*x = 6786 for x..

Answer:
-29

Question:
Solve 412*c = 436*c + 768 for c..

Answer:
-32