document.write( "Question 1125700: At the end of her shift a cashier has a total of $ 6.30 in dimes and quarters. There are 7 more dimes than quarters. How many of each of these coins does she have? \n" ); document.write( "

Algebra.Com's Answer #742020 by josmiceli(19441) $\"\"$ $\"About$

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Let $\"+d+\"$ = number of dimes
\n" ); document.write( "Let $\"+q+\"$ = number of quarters
\n" ); document.write( "ЧЧЧЧЧЧЧ
\n" ); document.write( " $\"+d+=+q+%2B+7+\"$
\n" ); document.write( " $\"+10d+%2B+25q+=+630+\"$ ( in cents )
\n" ); document.write( "ЧЧЧЧЧЧЧЧЧЧЧЧ
\n" ); document.write( " $\"+2d+%2B+5q+=+126+\"$
\n" ); document.write( "By substitution:
\n" ); document.write( " $\"+2%2A%28+q+%2B+7+%29+%2B+5q+=+126+\"$
\n" ); document.write( " $\"+2q+%2B+14+%2B+5q+=+126+\"$
\n" ); document.write( " $\"+7q+=+112+\"$
\n" ); document.write( " $\"+q+=+16+\"$
\n" ); document.write( "And
\n" ); document.write( " $\"+d+=+q+%2B+7+\"$
\n" ); document.write( " $\"+d+=+16+%2B+7+\"$
\n" ); document.write( " $\"+d+=+23+\"$
\n" ); document.write( "She has 23 dimes and 16 quarters
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