document.write( "Question 466300: Teas costing $7 per pound are to be mixed with teas costing $4 per pound to make a 30-pound mixture. If the mixture is to sell for $6 per pound, how many pounds of each kind of tea should be used? \n" ); document.write( "
Algebra.Com's Answer #319706 by nerdybill(7384)\"\" \"About 
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Teas costing $7 per pound are to be mixed with teas costing $4 per pound to make a 30-pound mixture. If the mixture is to sell for $6 per pound, how many pounds of each kind of tea should be used?
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\n" ); document.write( "Let x = amount (lbs) of $7 tea
\n" ); document.write( "then
\n" ); document.write( "30-x = amount of $4 tea
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\n" ); document.write( "7x + 4(30-x) = 6(30)
\n" ); document.write( "7x + 120-4x = 180
\n" ); document.write( "3x + 120 = 180
\n" ); document.write( "3x = 60
\n" ); document.write( "x = 20 lbs (of $7 tea)
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\n" ); document.write( "amount of $4 tea:
\n" ); document.write( "30-x = 30-20 = 10 lbs
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