document.write( "Question 1149427: A scientist mixes water (containing no salt) with a solution that contains 30% salt. She wants to obtain 150 ounces of a mixture that is 20% salt. How many ounces of water and how many ounces of the 30% salt solution should she use?
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Algebra.Com's Answer #770752 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
Let $\"+a+\"$ = ounces of water needed
\n" ); document.write( "Let $\"+b+\"$ = ounces of 30% solution needed
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\n" ); document.write( "(1) $\"+a+%2B+b+=+150+\"$
\n" ); document.write( "(2) $\"+.3b+%2F+150+=+.2+\"$
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\n" ); document.write( "(2) $\"+.3b+=+30+\"$
\n" ); document.write( "(2) $\"+b+=+100+\"$
\n" ); document.write( "and
\n" ); document.write( "(1) $\"+a+%2B+100+=+150+\"$
\n" ); document.write( "(1) $\"+a+=+50+\"$
\n" ); document.write( "--------------------------
\n" ); document.write( "50 ounces of water is needed
\n" ); document.write( "100 ounces of 30% solution is needed
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\n" ); document.write( "check:
\n" ); document.write( "(2) $\"+.3b+%2F+150+=+.2+\"$
\n" ); document.write( "(2) $\"+.3%2A100+%2F+150+=+.2+\"$
\n" ); document.write( "(2) $\"+30%2F150+=+.2+\"$
\n" ); document.write( "(2) $\"+.2+=+.2+\"$
\n" ); document.write( "OK \n" ); document.write( "

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