document.write( "Question 590057: how many quarts of pure antifreeze must be added to 4 quarts of a 20% antifreeze solution to obtain a 60% antifreeze solution? \n" ); document.write( "
Algebra.Com's Answer #375010 by lwsshak3(11628)\"\" \"About 
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how many quarts of pure antifreeze must be added to 4 quarts of a 20% antifreeze solution to obtain a 60% antifreeze solution?
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\n" ); document.write( "let x=quarts of pure antifreeze to be added.
\n" ); document.write( "20%*4+100%*x=60%(4+x)
\n" ); document.write( ".8+x=2.4+.6x
\n" ); document.write( ".4x=1.6
\n" ); document.write( "x=4
\n" ); document.write( "ans:
\n" ); document.write( "quarts of pure antifreeze to be added=4
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