document.write( "Question 428398: bob has 60 coins consisting of quarters and dimes. The coins combined value is $9.45. Find out how many are quarters and how many are dimes \n" ); document.write( "

Algebra.Com's Answer #297781 by mananth(16946) $\"\"$ $\"About$

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quarters ------------ x
\n" ); document.write( " dimes ------------ y
\n" ); document.write( "1 x + 1 y = 60 .............1
\n" ); document.write( "25 x + 10 y = 945 .............2
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\n" ); document.write( "multiply (1)by -10
\n" ); document.write( "Multiply (2) by 1
\n" ); document.write( "-10 x + -10 y = -600
\n" ); document.write( "25 x + 10 y = 945
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\n" ); document.write( "Add the two equations
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\n" ); document.write( "15 x=345
\n" ); document.write( "
\n" ); document.write( "/15
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\n" ); document.write( "x=23 quarters
\n" ); document.write( "
\n" ); document.write( "plug value of x in (1)
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\n" ); document.write( "x+y=60
\n" ); document.write( "23+y=60
\n" ); document.write( "y = 60 + -23
\n" ); document.write( "y = 37 dimes
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