163618

i solved this problem by finding all the possibilities and seeing which ones could all exist,by still using each number one time.envelope 1 could have 1-2,envelope 2 could have 7-0,envelope 3 could have 5-3,envelope 4 could have 9-4,envelope 5 could have 8-6,using all 9 numbers and the real questions answer is 8-0 6-2
1-7 3-5.