document.write( "Question 750537: 40 cups of juice contains 5% juice. how many cups of pure juice is needed to make 10% juice \n" ); document.write( "

Algebra.Com's Answer #456674 by josmiceli(19441) $\"\"$ $\"About$

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You can assume that this is a juice and water mixture.
\n" ); document.write( "Let $\"+x+\"$ = the cups of pure juice to be added
\n" ); document.write( " $\"+.05%2A40+=+2+\"$ cups of pure juice in 5% mixture
\n" ); document.write( "----------------
\n" ); document.write( " $\"+%28+2+%2B+x+%29+%2F+%28+40+%2B+x+%29+=+.1+\"$
\n" ); document.write( " $\"+2+%2B+x+=+.1%2A%28+40+%2B+x+%29+\"$
\n" ); document.write( " $\"+2+%2B+x+=+4+%2B+.1x+\"$
\n" ); document.write( " $\"+.9x+=+2+\"$
\n" ); document.write( " $\"+x+=+2.222+\"$
\n" ); document.write( "2.222 cups of pure juice are needed
\n" ); document.write( "check:
\n" ); document.write( " $\"+%28+2+%2B+x+%29+%2F+%28+40+%2B+x+%29+=+.1+\"$
\n" ); document.write( " $\"+%28+2+%2B+2.222+%29+%2F+%28+40+%2B+2.222+%29+=+.1+\"$
\n" ); document.write( " $\"+4.222+%2F+42.222+=+.1+\"$
\n" ); document.write( " $\"+.1+=+.1+\"$
\n" ); document.write( "OK \n" ); document.write( "

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