Question 1097361
.
Read this

<A HREF=https://www.algebra.com/algebra/homework/playground/test.faq.question.260969.html>https://www.algebra.com/algebra/homework/playground/test.faq.question.260969.html</A>


https://www.algebra.com/algebra/homework/playground/test.faq.question.260969.html


and do the same.



Actually, it is absolutely standard problem on investments.


You will meet it tens times during your school years, so it it much better to learn on how to do it once for all 
than ask tutors to solve it instead of doing it on your own.



So, the correct question from your side would be: "where I can learn about it ?"


And then my answer is: look into the lesson

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=https://www.algebra.com/algebra/homework/coordinate/lessons/Using-systems-of-equations-to-solve-problems-on-investment.lesson>Using systems of equations to solve problems on investment</A>

in this site.


You will find there solved problems with full explanations.