document.write( "Question 1099061: You need a 80% alcohol solution. On hand, you have a 60 mL of a 5% alcohol mixture. How much pure alcohol will you need to add to obtain the desired solution? \n" ); document.write( "

Algebra.Com's Answer #713461 by josmiceli(19441) $\"\"$ $\"About$

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Let $\"+x+\"$ = mL of pure alcohol needed
\n" ); document.write( " $\"+.05%2A60+=+3+\"$ mL of alcohol in the 5% mixture
\n" ); document.write( "--------------------------------------------
\n" ); document.write( " $\"+%28+x+%2B+3+%29+%2F+%28+x+%2B+60+%29+=+.8+\"$
\n" ); document.write( " $\"+x+%2B+3+=+.8%2A%28+x+%2B+60+%29+\"$
\n" ); document.write( " $\"+x+%2B+3+=+.8x+%2B+48+\"$
\n" ); document.write( " $\"+.2x+=+45+\"$
\n" ); document.write( " $\"+x+=+225+\"$
\n" ); document.write( "225 mL of pure alcohol should be added
\n" ); document.write( "----------------------------------------
\n" ); document.write( "check answer:
\n" ); document.write( " $\"+%28+x+%2B+3+%29+%2F+%28+x+%2B+60+%29+=+.8+\"$
\n" ); document.write( " $\"+%28+225+%2B+3+%29+%2F+%28+225+%2B+60+%29+=+.8+\"$
\n" ); document.write( " $\"+228+%2F+285+=+.8+\"$
\n" ); document.write( " $\"+228+=+.8%2A285+\"$
\n" ); document.write( " $\"+228+=+228+\"$
\n" ); document.write( "OK \n" ); document.write( "

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