document.write( "Question 428511: How much pure acid should be mixed with 6 gallons if a 60% acid in order to get a 70% acid solution \n" ); document.write( "

Algebra.Com's Answer #297818 by mananth(16946) $\"\"$ $\"About$

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.......... Percent ---------------- quantity
\n" ); document.write( "Solution ..........60----------------30
\n" ); document.write( "Pure acid.........100----------------x
\n" ); document.write( "Total 70 ---------------- 30+x
\n" ); document.write( "60*6+100 *x=70(6+ x)
\n" ); document.write( "360+100x =420+70x
\n" ); document.write( "100x-70 x=420-360
\n" ); document.write( "
\n" ); document.write( "30x=60
\n" ); document.write( "/30
\n" ); document.write( "x=2 gallons 100 % Pure acid
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