document.write( "Question 707365: How many gallons of a 90% antifreeze solution must be mixed with 60 gallons of 10% antifreeze to get a mixture that is 80% antifreeze? \n" ); document.write( "
Algebra.Com's Answer #435847 by nshah11(47)\"\" \"About 
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(0.9(x) + 60(1/10))/(60 + x) = 0.8\r
\n" ); document.write( "\n" ); document.write( "48 + 0.8x = 0.9x + 6\r
\n" ); document.write( "\n" ); document.write( "0.1x = 42\r
\n" ); document.write( "\n" ); document.write( "x = 420 gallons
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