document.write( "Question 578751: how many quarts of pure antifreeze must be added to two quarts of a 30% anitfreeze solution to obtain a 50% anitfreeze solution? \n" ); document.write( "

Algebra.Com's Answer #370758 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
Let $\"x\"$ = quarts of pure antifreeze to be added
\n" ); document.write( "given:
\n" ); document.write( " $\"+.3%2A2+=+.6+\"$ quarts of pure antifreeze in 30% solution
\n" ); document.write( " $\"+%28+x+%2B+.6+%29+%2F+%28+x+%2B+2+%29+=+.5+\"$
\n" ); document.write( " $\"+x+%2B+.6+=+.5%2A%28+x+%2B+2+%29+\"$
\n" ); document.write( " $\"+x+%2B+.6+=+.5x+%2B+1+\"$
\n" ); document.write( " $\"+.5x+=+.4+\"$
\n" ); document.write( " $\"+x+=+.8+\"$
\n" ); document.write( ".8 quarts of pure antifreeze must be added
\n" ); document.write( "check:
\n" ); document.write( " $\"+%28+.8+%2B+.6+%29+%2F+%28+.8+%2B+2+%29+=+.5+\"$
\n" ); document.write( " $\"+1.4+%2F+2.8+=+.5+\"$
\n" ); document.write( " $\"+1.4+=+.5%2A2.8+\"$
\n" ); document.write( " $\"+1.4+=+1.4+\"$
\n" ); document.write( "OK \n" ); document.write( "

\n" );