document.write( "Question 885396: One canned juice drink is 20% orange juice; another is 10% orange juice. How many liters of each should be mixed together in order to get 10L that is 15% orange juice?\r
\n" ); document.write( "\n" ); document.write( "How many liters of the 20% orange juice should be in the mixture?
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Algebra.Com's Answer #535133 by josmiceli(19441)\"\" \"About 
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Let \"+a+\" = liters of 20% juice drink needed
\n" ); document.write( "Let \"+b+\" = liters of 10% juice drink needed
\n" ); document.write( "\"+.2a+\" = liters of juice in 20% juice drink
\n" ); document.write( "\"+.1b+\" = liters of juice in 10% juice drink
\n" ); document.write( "---------------------------------------
\n" ); document.write( "(1) \"+a+%2B+b+=+10+\"
\n" ); document.write( "(2) \"+%28+.2a+%2B+.1b+%29+%2F+10+=+.15+\"
\n" ); document.write( "------------------------------
\n" ); document.write( "(2) \"+.2a+%2B+.1b+=+1.5+\"
\n" ); document.write( "(2) \"+2a+%2B+b+=+15+\"
\n" ); document.write( "Subtract (1) from (2)
\n" ); document.write( "(2) \"+2a+%2B+b+=+15+\"
\n" ); document.write( "(1) \"+-a+-+b+=+-10+\"
\n" ); document.write( "\"+a+=+5+\"
\n" ); document.write( "-------------
\n" ); document.write( "and
\n" ); document.write( "(1) \"+a+%2B+b+=+10+\"
\n" ); document.write( "(1) \"+5+%2B+b+=+10+\"
\n" ); document.write( "(1) \"+b+=+5+\"
\n" ); document.write( "---------------
\n" ); document.write( "5 liters of 20% juice drink are needed
\n" ); document.write( "5 liters of 10% juice drink are needed
\n" ); document.write( "check:
\n" ); document.write( "(2) \"+%28+.2a+%2B+.1b+%29+%2F+10+=+.15+\"
\n" ); document.write( "(2) \"+%28+.2%2A5+%2B+.1%2A5+%29+%2F+10+=+.15+\"
\n" ); document.write( "(2) \"+%28+1+%2B+.5+%29+%2F+10+=+.15+\"
\n" ); document.write( "(2) \"+1.5+=+1.5+\"
\n" ); document.write( "OK
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