document.write( "Question 1010509: How much solution must be drained from a full 35 litre mug of hot chocolate and replaced with pure chocolate syrup to increase the chocolate concentration from 10% to 45%? \n" ); document.write( "

Algebra.Com's Answer #625966 by josmiceli(19441) $\"\"$ $\"About$

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Let $\"+x+\"$ = litters of solution to be drained off
\n" ); document.write( "and replaced with pure chocolate
\n" ); document.write( " $\"+.1%2Ax+\"$ = litters of chocolate in solution drained off
\n" ); document.write( " $\"+.1%2A35+=+3.5+\"$ litters of chocolate to begin with
\n" ); document.write( "-------------------------------------------
\n" ); document.write( " $\"+%28+3.5+-+.1x+%2B+x+%29+%2F++35++=+.45+\"$
\n" ); document.write( " $\"+3.5+-+.1%2Ax+%2B+x+=+.45%2A35+\"$
\n" ); document.write( " $\"+3.5+-+.1%2Ax+%2B+x+=+15.75+\"$
\n" ); document.write( " $\"+.9x+=+12.25+\"$
\n" ); document.write( " $\"+x+=+13.611+\"$
\n" ); document.write( "13.611 litters must be drained off and
\n" ); document.write( "replaced with pure chocolate \n" ); document.write( "

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