document.write( "Question 1074116: Rachel is a third of her dads age, in 13 years she will be half her age. Find the age of Rachel and her dad \n" ); document.write( "
Algebra.Com's Answer #688831 by josgarithmetic(39620)\"\" \"About 
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Change to this way:
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\n" ); document.write( "Rachel is a third of her dads age, in 13 years she will be half her HIS age. Find the age of Rachel and her dad.
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\n" ); document.write( "\n" ); document.write( "r, Rachel's age
\n" ); document.write( "d, Dad's age\r
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\n" ); document.write( "\n" ); document.write( "Translate the description:
\n" ); document.write( "\"system%28r=d%2F3%2Cr%2B13=%28d%2B13%29%2F2%29\"\r
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\n" ); document.write( "\n" ); document.write( "Substitute and solve:\r
\n" ); document.write( "\n" ); document.write( "\"d%2F3%2B13=%28d%2B13%29%2F2\"\r
\n" ); document.write( "\n" ); document.write( "\"2d%2B6%2A13=3d%2B3%2A13\"\r
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\n" ); document.write( "\n" ); document.write( ".
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\n" ); document.write( "\"d=13%286-3%29\"\r
\n" ); document.write( "\n" ); document.write( "\"d=13%2A3\"\r
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\n" ); document.write( "\n" ); document.write( "\"highlight%28system%28d=39%2Cr=13%29%29\"
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