document.write( "Question 921002: what equal amount of nickels and dimes do you need to make $1.20
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Algebra.Com's Answer #558675 by Hawksfan(61) You can put this solution on YOUR website! Let's think of it this way... \r \n" ); document.write( "\n" ); document.write( "What is the value of a dime? ... .10 \n" ); document.write( "What is the value of a nickel ... .05 \n" ); document.write( "Let n = nickels \n" ); document.write( "d = dimes \n" ); document.write( ".05n + .10d= 1.20 multiply by 100 \n" ); document.write( "5n + 10d = 120\r \n" ); document.write( "\n" ); document.write( "Also they said the amount of dimes and nickels are equal \n" ); document.write( "n=d\r \n" ); document.write( "\n" ); document.write( "substitute n = d into the other equation,\r \n" ); document.write( "\n" ); document.write( "5d + 10d = 120 \n" ); document.write( "15d =120\r \n" ); document.write( "\n" ); document.write( "d = 8 so n = 8\r \n" ); document.write( "\n" ); document.write( "Lets check it. \n" ); document.write( "5*8 + 10*8 = 120 \n" ); document.write( "40 + 80 = 120 \n" ); document.write( "120 = 120 \n" ); document.write( " |