document.write( "Question 1031694: 800 liters of a 79% glycol solution was available. How much pure glycol should be extracted so that the remainder would be only 30% glycol \n" ); document.write( "

Algebra.Com's Answer #646387 by josmiceli(19441) $\"\"$ $\"About$

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Let $\"+x+\"$ = liters of pure glycol
\n" ); document.write( "to be extracted
\n" ); document.write( "--------------------
\n" ); document.write( " $\"+.79%2A800+=+632+\"$ liters of pure
\n" ); document.write( "glycol in 79% solution
\n" ); document.write( "----------------------------
\n" ); document.write( " $\"+800+-+x+\"$ = liters of 79% glycol
\n" ); document.write( "solution remaining
\n" ); document.write( "--------------------
\n" ); document.write( " $\"+632+-+x+\"$ = liters of pure glycol
\n" ); document.write( "remaining
\n" ); document.write( "--------------------
\n" ); document.write( " $\"+%28+632+-+x+%29+%2F+%28+800+-+x+%29+=+.3+\"$
\n" ); document.write( " $\"+632+-+x+=+.3%2A%28+800+-+x+%29+\"$
\n" ); document.write( " $\"+632+-+x+=+240+-+.3x+\"$
\n" ); document.write( " $\"+.7x+=+392+\"$
\n" ); document.write( " $\"+x+=+560+\"$
\n" ); document.write( "560 liters of pure glycol should be extracted
\n" ); document.write( "-------------------------------------
\n" ); document.write( "check the answer:
\n" ); document.write( " $\"+632+-+560+=+72+\"$ liters of pure glycol is left
\n" ); document.write( " $\"+800+-+560+=+240+\"$ liters of solution is left
\n" ); document.write( " $\"+72%2F240+=+.3+\"$
\n" ); document.write( "OK \n" ); document.write( "

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