document.write( "Question 1084679: How much pure acid shold be mixed with 7 gallons of a 40% acid solution in order to get a 80% acid solution? \n" ); document.write( "

Algebra.Com's Answer #698748 by josgarithmetic(39618) $\"\"$ $\"About$

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$\"%28100x%2B40%2A7%29%2F%28x%2B7%29=80\"$ \r
\n" ); document.write( "\n" ); document.write( "-\r
\n" ); document.write( "\n" ); document.write( " $\"10x%2B4%2A7=8%28x%2B7%29\"$
\n" ); document.write( " $\"10x%2B28=8x%2B56\"$
\n" ); document.write( " $\"2x=56-28\"$
\n" ); document.write( " $\"2x=28\"$
\n" ); document.write( " $\"x=14\"$ ---------fourteen gallons of pure acid \n" ); document.write( "

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