document.write( "Question 286109: The owner of a tea shop wants to mix three kinds of tea to make 100oz of a mixture that will sell for $0.83 per oz. He uses Orange Pekoe, which sells for $0.80 per oz, Irish Breakfast, for $0.85 per oz, and Earl Grey which sells for $0.95 per oz. If he wants to use twice as much Orang Pekoe as Irish Breakfast, how much of each kind of tea should be used? \n" ); document.write( "
Algebra.Com's Answer #207486 by ankor@dixie-net.com(22740)\"\" \"About 
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The owner of a tea shop wants to mix three kinds of tea to make 100oz of a
\n" ); document.write( " mixture that will sell for $0.83 per oz.
\n" ); document.write( " He uses Orange Pekoe, which sells for $0.80 per oz, Irish Breakfast, for $0.85
\n" ); document.write( " per oz, and Earl Grey which sells for $0.95 per oz.
\n" ); document.write( "If he wants to use twice as much Orange Pekoe as Irish Breakfast, how much of
\n" ); document.write( "each kind of tea should be used?
\n" ); document.write( ":
\n" ); document.write( "Let x = amt of Irish breakfast tea required
\n" ); document.write( "It says,\"use twice as much Orange Pekoe as Irish Breakfast\", therefore:
\n" ); document.write( "2x = amt of Orange Pekoe Tea
\n" ); document.write( ":
\n" ); document.write( "Let y = amt of Earl Grey
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\n" ); document.write( "Amt of tea equation
\n" ); document.write( "x + 2x + y = 100 oz
\n" ); document.write( "3x + y = 100
\n" ); document.write( "y = (100-3x)
\n" ); document.write( ":
\n" ); document.write( "Cost of tea equation
\n" ); document.write( ".85x + .80(2x) + .95y = .83(100)
\n" ); document.write( ".85x + 1.60x + .95y = 83
\n" ); document.write( "2.45x + .95y = 83
\n" ); document.write( ":
\n" ); document.write( "Replace y with (100-3x)
\n" ); document.write( "2.45x + .95(100-3x) = 83
\n" ); document.write( "2.45x + 95 - 2.85x = 83
\n" ); document.write( "2.45x - 2.85x = 83 - 95
\n" ); document.write( "-.40x = -12
\n" ); document.write( "x = \"%28-12%29%2F%28-.4%29\"
\n" ); document.write( "x = 30 oz of Irish Tea required
\n" ); document.write( "then
\n" ); document.write( "2(30) = 60 oz of Orange Pekoe
\n" ); document.write( "and
\n" ); document.write( "y = 100 - 90
\n" ); document.write( "y = 10 oz of Earl Grey
\n" ); document.write( ":
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\n" ); document.write( "Check solution in cost equation
\n" ); document.write( ".85(30) + .80(60) + .95(10) = .83(100)
\n" ); document.write( "25.5 + 48.0 + 9.5 = 83
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