document.write( "Question 170944: If I have 45 dimes and quarters and I have $7.50. How many of each coin do I have? What would be the equation to solve this problem? \n" ); document.write( "

Algebra.Com's Answer #126200 by Mathtut(3670) $\"\"$ $\"About$

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lets call # of dimes and quarters, d and q, respectively
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\n" ); document.write( "d+q=45.........eq 1
\n" ); document.write( ".1d+.25q=7.5...eq 2
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\n" ); document.write( "lets rewrite eq 1. to d=45-q.....now take d's value and plug it into eq 2
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\n" ); document.write( ".1(45-q)+.25q=7.5--->distribute
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\n" ); document.write( "4.5-.1q+.25q=7.5---->combine like terms
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\n" ); document.write( ".15q=3
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\n" ); document.write( " $\"highlight%28q=20%29\"$ quarters
\n" ); document.write( " $\"highlight%28d=45-20=25%29\"$ dimes \n" ); document.write( "

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