document.write( "Question 1033211: You need a 80% alcohol solution. On hand, you have a 225 mL of a 15% alcohol mixture. You also have 95% alcohol mixture. How much of the 95% mixture will you need to add to obtain the desired solution? \n" ); document.write( "

Algebra.Com's Answer #647775 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
Let $\"+x+\"$ = ml of 95% solution needed
\n" ); document.write( " $\"+.95x+\"$ = ml of alcohol in 95% solution
\n" ); document.write( " $\"+.15%2A225+=+33.75+\"$ = ml of alcohol in 15% solution
\n" ); document.write( "-------------------------------
\n" ); document.write( " $\"+%28+.95x+%2B+33.75+%29+%2F+%28+x+%2B+225+%29+=+.8+\"$
\n" ); document.write( " $\"+.95x+%2B+33.75+=+.8%2A%28+x+%2B+225+%29+\"$
\n" ); document.write( " $\"+.95x+%2B+33.75+=+.8x+%2B+180+\"$
\n" ); document.write( " $\"+.15x+=+146.25+\"$
\n" ); document.write( " $\"+x+=+975+\"$
\n" ); document.write( "975 ml of the 95% solution is needed
\n" ); document.write( "-------------------
\n" ); document.write( "check:
\n" ); document.write( " $\"+%28+.95%2A975+%2B+33.75+%29+%2F+%28+975+%2B+225+%29+=+.8+\"$
\n" ); document.write( " $\"+%28+926.25+%2B+33.75+%29+%2F+1200+=+.8+\"$
\n" ); document.write( " $\"+960+%2F+1200+=+.8+\"$
\n" ); document.write( " $\"+960+=+960+\"$
\n" ); document.write( "OK \n" ); document.write( "

\n" );