document.write( "Question 172826: Joe has a collection of nickles and dimes that is worth, $7.05. If the # of dimes were doubled, and the # of nicles were increased by eight, the value of the coins would be, $11.75. How many dimes does he have?\r
\n" ); document.write( "\n" ); document.write( "It really helps me to understand if I can See each step to solve this problem written out like in a math book. Thank you
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Algebra.Com's Answer #127675 by checkley77(12844)\"\" \"About 
You can put this solution on YOUR website!
Let D=the number of dimes.
\n" ); document.write( "Let N=the number of nickles.
\n" ); document.write( ".10D+.05N=7.05 (multiply this equation by -2 & add to the other equation
\n" ); document.write( ".10*2D+.05(N+8)=11.75
\n" ); document.write( ".20D+.05N+.40=11.75
\n" ); document.write( ".20D+.05N=11.75-.40
\n" ); document.write( ".20D+.05N=11.35
\n" ); document.write( "-.20D-.10N=-14.10
\n" ); document.write( "-----------------------
\n" ); document.write( "-.05N=-2.75
\n" ); document.write( "N=-2.75/-.05
\n" ); document.write( "N=55 nickles.
\n" ); document.write( ".10D+.05*55=7.05
\n" ); document.write( ".10D+2.75=7.05
\n" ); document.write( ".10D=7.05-2.75
\n" ); document.write( ".10D=4.30
\n" ); document.write( "D=4.30/.10
\n" ); document.write( "D=43 dimes.
\n" ); document.write( "Proof:
\n" ); document.write( ".20*43+.05*55=11.35
\n" ); document.write( "8.60+2.75=11.35
\n" ); document.write( "11.35=11.35
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