Answer:
n = 30
Explanation:
1/5 = 6/30
1/6 = 5/30
Then:
1/5 = 1/6 + 1/n
It´s equivalent to:
6/30 = 5/30 + 1/n
6/30 - 5/30 = 1/n
1/30 = 1/n
n*1/30 = 1
n = 1*30
Check:
1/5 = 1/6 + 1/30
6/30 = 5/30 + 1/30
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