document.write( "Question 807704: A cashier has 90 dimes and Nickels in a cash drawer. If the total is 6.40, how many nickel's are in the drawer? I divided 90 into 640 my answer 2 nickels. \n" ); document.write( "

Algebra.Com's Answer #486470 by josmiceli(19441) $\"\"$ $\"About$

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Let $\"+n+\"$ = number of nickels
\n" ); document.write( "Let $\"+d+\"$ = number of dimes
\n" ); document.write( "---------------
\n" ); document.write( "(1) $\"+n+%2B+d+=+90+\"$
\n" ); document.write( "(2) $\"+5n+%2B+10d+=+640+\"$ ( in cents )
\n" ); document.write( "-------------------------------
\n" ); document.write( "(2) $\"+n+%2B+2d+=+128+\"$
\n" ); document.write( "Subtract (1) from (2)
\n" ); document.write( "(2) $\"+n+%2B+2d+=+128+\"$
\n" ); document.write( "(1) $\"+-n+-+d+=+-90+\"$
\n" ); document.write( " $\"+d+=+38+\"$
\n" ); document.write( "and, since
\n" ); document.write( "(1) $\"+n+%2B+d+=+90+\"$
\n" ); document.write( "(1) $\"+n+%2B+38+=+90+\"$
\n" ); document.write( "(1) $\"+n+=+52+\"$
\n" ); document.write( "52 nickels are in the drawer
\n" ); document.write( "------------------------
\n" ); document.write( "check:
\n" ); document.write( "(2) $\"+5n+%2B+10d+=+640+\"$
\n" ); document.write( "(2) $\"+5%2A52+%2B+10%2A38+=+640+\"$
\n" ); document.write( "(2) $\"+260+%2B+380+=+640+\"$
\n" ); document.write( "(2) $\"+640+=+640+\"$
\n" ); document.write( "OK \n" ); document.write( "

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