Question 1074577
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<pre>
N = # of nickels.
D = # of dimes.

Then the number of quarters is N + D + 10.

Equations:

 N +   D +   (N+D+10) =  40,     (1)   (coins)
5N + 10D + 25(N+D+10) = 725      (2)   (cents)


I just explained to you how to solve the problem: 


   - write the system in the standard for;
   - simplify it;
   - then apply the substitution method.

I assume that you are smart enough (by solving the problems of the Sherlock level !), so I hope you will be able to complete it on your own.
</pre>


The links to the solutions of previous similar problems:

<A HREF=https://www.algebra.com/algebra/homework/coordinate/word/Linear_Equations_And_Systems_Word_Problems.faq.question.1074575.html>https://www.algebra.com/algebra/homework/coordinate/word/Linear_Equations_And_Systems_Word_Problems.faq.question.1074575.html</A>

https://www.algebra.com/algebra/homework/coordinate/word/Linear_Equations_And_Systems_Word_Problems.faq.question.1074575.html


and


<A HREF=https://www.algebra.com/algebra/homework/coordinate/word/Linear_Equations_And_Systems_Word_Problems.faq.question.1074578.html>https://www.algebra.com/algebra/homework/coordinate/word/Linear_Equations_And_Systems_Word_Problems.faq.question.1074578.html</A>

https://www.algebra.com/algebra/homework/coordinate/word/Linear_Equations_And_Systems_Word_Problems.faq.question.1074578.html