document.write( "Question 410277: there are 24 coins made up of quarters and dimes which amount to 3.90$. how many of each kind of coins are there. let x represent...let y represent \n" ); document.write( "

Algebra.Com's Answer #288553 by josmiceli(19441) $\"\"$ $\"About$

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(1) $\"d+%2B+q+=+24\"$
\n" ); document.write( "(2) $\"10d+%2B+25q+=+390\"$ (in cents)
\n" ); document.write( "multiply both sides of (1) by $\"10\"$ and
\n" ); document.write( "subtract (1) from (2)
\n" ); document.write( "(2) $\"10d+%2B+25q+=+390\"$
\n" ); document.write( "(1) $\"-10d+-+10q+=+-240\"$
\n" ); document.write( " $\"15q+=+150\"$
\n" ); document.write( " $\"q+=+10\"$
\n" ); document.write( "and, since
\n" ); document.write( "(1) $\"d+%2B+q+=+24\"$
\n" ); document.write( " $\"d+=+24+-+10\"$
\n" ); document.write( " $\"d+=+14\"$
\n" ); document.write( "There are 14 dimes and 10 quarters \n" ); document.write( "

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