document.write( "Question 1005197: In the chemistry lab, Efren mixed salt and water to produced 4 liters of a 50% solution. He wanted to know how many liters he will have to evaporate so that he gets a 75% solution? \n" ); document.write( "

Algebra.Com's Answer #621557 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"+.5%2A4+=+2+\"$ liters of water to start with
\n" ); document.write( "Let $\"+x+\"$ liters = amount to be evaporated
\n" ); document.write( "-------------------------------------
\n" ); document.write( "You end up with the same liters of salt you started with ( 2 liters )
\n" ); document.write( " $\"+2+%2F+%28+4+-+x+%29+=+.75+\"$
\n" ); document.write( " $\"+2+=+.75%2A%28+4+-+x+%29+\"$
\n" ); document.write( " $\"+2+=+3+-+.75x+\"$
\n" ); document.write( " $\"+.75x+=+1+\"$
\n" ); document.write( " $\"+x+=+1.333+\"$
\n" ); document.write( "--------------
\n" ); document.write( "1 and 1/3 liters must be evaporated
\n" ); document.write( "--------------
\n" ); document.write( "check:
\n" ); document.write( " $\"+2+%2F+%28+4+-+x+%29+=+.75+\"$
\n" ); document.write( " $\"+2+%2F+%28+4+-+4%2F3++%29+=+.75+\"$
\n" ); document.write( " $\"+2+%2F+%28+8%2F3+%29+=+3%2F4+\"$
\n" ); document.write( " $\"+6%2F8+=+3%2F4+\"$
\n" ); document.write( " $\"+3%2F4+=+3%2F4+\"$
\n" ); document.write( "OK \n" ); document.write( "

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