document.write( "Question 1120960: A chemical company makes two brands of antifreeze. The first brand is
\n" ); document.write( "35%
\n" ); document.write( " pure antifreeze, and the second brand is
\n" ); document.write( "85%
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\n" ); document.write( "50
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\n" ); document.write( "65%
\n" ); document.write( " pure antifreeze, how many gallons of each brand of antifreeze must be used?
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Algebra.Com's Answer #736683 by josmiceli(19441)\"\" \"About 
You can put this solution on YOUR website!
Let \"+a+\" = gallons of 35% antifreeze needed
\n" ); document.write( "Let \"+b+\" = gallons of 85% antifreeze needed
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\n" ); document.write( "(1) \"+%28+.35a+%2B+.85b+%29+%2F+50+=+.65+\"
\n" ); document.write( "(2) \"+a+%2B+b+=+50+\"
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\n" ); document.write( "(1) \"+.35a+%2B+.85b+=+32.5+\"
\n" ); document.write( "(1) \"+35a+%2B+85b+=+3250+\"
\n" ); document.write( "(1) \"+7a+%2B+17b+=+650+\"
\n" ); document.write( "(2) \"+-7a+-+7b+=+-350+\"
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\n" ); document.write( "\"+10b+=+300+\"
\n" ); document.write( "\"+b+=+30+\"
\n" ); document.write( "And
\n" ); document.write( "(2) \"+a+%2B+30+=+50+\"
\n" ); document.write( "(2) \"+a+=+20+\"
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\n" ); document.write( "20 gallons of 35% antifreeze are needed
\n" ); document.write( "30 gallons of 85% antifreeze are needed\r
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