Question 597325
<font face="Times New Roman" size="+2">


Let *[tex \LARGE x] represent the number of dimes and then *[tex \LARGE x\ -\ 10] has to be the number of nickels.  Dimes are worth 10 cents each, so the total value of the dimes must be *[tex \LARGE 10x] cents.  Likewise, nickels are worth 5 cents so the total value of the nickels is *[tex \LARGE 5(x\ -\ 10)].


All together the dimes and nickels are worth $3.10, which is the same thing as 310 cents, hence:


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ 10x\ +\ 5(x\ -\ 10)\ =\ 310]


Solve for *[tex \LARGE x], then calculate *[tex \LARGE x\ -\ 10].


John
*[tex \LARGE e^{i\pi} + 1 = 0]
My calculator said it, I believe it, that settles it
<div style="text-align:center"><a href="http://outcampaign.org/" target="_blank"><img src="http://cdn.cloudfiles.mosso.com/c116811/scarlet_A.png" border="0" alt="The Out Campaign: Scarlet Letter of Atheism" width="143" height="122" /></a></div>
</font>