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@Kkutie7
is it 5?
3n+6/3=15 -->3n+6=5 --->3n=-1 ---> n=-1/3. do you understand?
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It's n=13
@narissa I made a mistake 3n+6/3=15 ---> 3n+6=45 ---> 3n=39 n=13
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