document.write( "Question 888672: a merchant has coffee worth $20 a pound that she wishes to mix with 60 pounds of $90 a pound to get a mixture that can be sold for $60 a pound. How many pounds of the $20 coffee should be used? \n" ); document.write( "
Algebra.Com's Answer #537648 by josgarithmetic(39617)\"\" \"About 
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\"Money%2FPoundsMix\"=\"Price\"\r
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\n" ); document.write( "\n" ); document.write( "Let x = how many pounds of the $20/pound coffee.\r
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\n" ); document.write( "\n" ); document.write( "\"highlight_green%28%2820x%2B90%2A60%29%2F%28x%2B60%29=60%29\"\r
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\n" ); document.write( "\n" ); document.write( "Some simplification,
\n" ); document.write( "\"%282x%2B9%2A6%2A10%29%2F%28x%2B60%29=6\"
\n" ); document.write( "\"%28x%2B9%2A3%2A10%29%2F%28x%2B60%29=3\"
\n" ); document.write( "\"x%2B270=3%28x%2B60%29\"
\n" ); document.write( "\"x%2B270=3x%2B180\"
\n" ); document.write( "\"270-180=2x\"
\n" ); document.write( "\"2x=90\"
\n" ); document.write( "\"highlight%28x=45%29\"
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