Answer:
20 bottles
Step-by-step explanation:
Number of bottles

He now has 44 so subtract 17 from that and you get 27 (1/2 of the number of his original stamp collection). Then add 27 +27 and you get 54. I believe 54 is the answer. Hope that helps!
Answer: x = -8
Step-by-step explanation: Move all the terms that don't contain x to the right side and solve.
Hope this helps! :) ~Zane