document.write( "Question 736645: john has twice the number of quarters as dimes. the amount of money in$1.80. find the number of dimes \n" ); document.write( "

Algebra.Com's Answer #449949 by josmiceli(19441) $\"\"$ $\"About$

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(1) $\"+10d+%2B+25q+=+180+\"$ ( in cents )
\n" ); document.write( "(2) $\"+q+=+2d+\"$
\n" ); document.write( "--------------
\n" ); document.write( "(1) $\"+10d+%2B+25q+=+180+\"$
\n" ); document.write( "(2) $\"+d+=+q%2F2+\"$
\n" ); document.write( "Substitute (2) into (1)
\n" ); document.write( "(1) $\"+10%2A%28q%2F2%29+%2B+25q+=+180+\"$
\n" ); document.write( "(1) $\"+5q+%2B+25q+=+180+\"$
\n" ); document.write( "(1) $\"+30q+=+180+\"$
\n" ); document.write( "(1) $\"+q+=+6+\"$
\n" ); document.write( "and
\n" ); document.write( "(2) $\"+d+=+q%2F2+\"$
\n" ); document.write( "(2) $\"+d+=+6%2F2+\"$
\n" ); document.write( "(2) $\"+d+=+3+\"$
\n" ); document.write( "There are 3 dimes
\n" ); document.write( "check:
\n" ); document.write( "(1) $\"+10%2A3+%2B+25%2A6+=+180+\"$
\n" ); document.write( "(1) $\"+30+%2B+150+=+180+\"$
\n" ); document.write( "(1) $\"+180+=+180+\"$
\n" ); document.write( "OK
\n" ); document.write( " \n" ); document.write( "

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