document.write( "Question 1108119: how many gallons of a 90% antifreeze solution must be mixed with 90 gallons of 15% antifreeze to get a mixture that is 80% antifreeze? \n" ); document.write( "

Algebra.Com's Answer #723121 by josgarithmetic(39620) $\"\"$ $\"About$

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x, how much of the 90% antifreeze to add\r
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\n" ); document.write( "\n" ); document.write( " $\"%2815%2A90%2B90x%29%2F%28x%2B90%29=80\"$ \n" ); document.write( "

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