Answer: 5, 7, 9
Explanation:
1st#: 2k+1
2nd#: 2k+3
3rd#: 2k+5
2(2k+1 + 2k+3 + 2k+5) = 3(2k+5) + 15
2(6k + 9) = 6k + 15 + 15
12k + 18 = 6k + 30
6k = 12
k = 2
1st#: 2k+1 = 2(2) + 1 = 5
2nd#: 2k+3 = 2(2) + 3 = 7
3rd#: 2k+5 = 2(2) + 5 = 9
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