document.write( "Question 779613: 5 quart solution of 30% antifreeze plus how many quarts of 100% antifreeze to get a 40% antifreeze solution? \n" ); document.write( "
Algebra.Com's Answer #475304 by josmiceli(19441)\"\" \"About 
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\"+.3%2A5+=+1.5+\" quarts of antifreeze in 30% solution
\n" ); document.write( "Let \"+x+\" = quarts of pure antifreeze to be added
\n" ); document.write( "--------------
\n" ); document.write( "\"+%28+1.5+%2B+x+%29+%2F+%28+5+%2B+x+%29+=+.4+\"
\n" ); document.write( "--------------
\n" ); document.write( "\"+1.5+%2B+x+=+.4%2A%28+5+%2B+x+%29+\"
\n" ); document.write( "\"+1.5+%2B+x+=+2+%2B+.4x+\"
\n" ); document.write( "\"+.6x+=+2+-+1.5+\"
\n" ); document.write( "\"+.6x+=+.5+\"
\n" ); document.write( "\"+x+=+5%2F6+\"
\n" ); document.write( "5/6 of a quart of 100% antifreeze must be added
\n" ); document.write( "check:
\n" ); document.write( "\"+%28%28+1.5+%2B+x+%29%29+%2F+%28%28+5+%2B+x+%29%29+=+.4+\"
\n" ); document.write( "\"+%28%28+1.5+%2B+5%2F6+%29%29+%2F+%28%28+5+%2B+5%2F6+%29%29+=+.4+\"
\n" ); document.write( "\"+%28%28+9%2F6+%2B+5%2F6+%29%29+%2F+%28%28+30%2F6+%2B+5%2F6+%29%29+=+.4+\"
\n" ); document.write( "\"+%28%28+14%2F6+%29%29+%2F+%28%28+35%2F6+%29%29+=+.4+\"
\n" ); document.write( "\"+14%2F35+=+.4+\"
\n" ); document.write( "\"+2%2F5++=+.4+\"
\n" ); document.write( "\"+.4+=+.4+\"
\n" ); document.write( "OK
\n" ); document.write( "
\n" );