Question 1196285
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                D U P L I C A T E ,   T R I P L I C A T E,   Q U A D R U P L I C A T E



I just solved/answered this problem/question.    See the link


<A HREF=https://www.algebra.com/algebra/homework/Finance/Finance.faq.question.1196146.html>https://www.algebra.com/algebra/homework/Finance/Finance.faq.question.1196146.html</A>


https://www.algebra.com/algebra/homework/Finance/Finance.faq.question.1196146.html



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If you did not get understanding from my  original solution under the referred link,


then I'm afraid nothing will help you.