document.write( "Question 66951: Florence Flask has 500 grams of a 72% salt solution. How much water must she add to obtain a 25 % salt solution? \n" ); document.write( "

Algebra.Com's Answer #47597 by ptaylor(2198) $\"\"$ $\"About$

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\n" ); document.write( "Let x=amount of water to be added\r
\n" ); document.write( "\n" ); document.write( "Now we know that the amount of pure salt in the solution before the water is added (.72)(500) is equal to the pure salt in the solution after the water is added (.25)(500+x). So our equation to solve is:\r
\n" ); document.write( "\n" ); document.write( "(.72)(500)=(.25)(500+x) get rid of parens by multiplying out:\r
\n" ); document.write( "\n" ); document.write( "360=125+.25x subtract 125 from both sides\r
\n" ); document.write( "\n" ); document.write( "360-125=125-125+.25x\r
\n" ); document.write( "\n" ); document.write( "235=.25x divide both sides by .25
\n" ); document.write( "x=940 grams----------------amount of water to be added\r
\n" ); document.write( "\n" ); document.write( "CK\r
\n" ); document.write( "\n" ); document.write( "500(.72)=.25(500+940)
\n" ); document.write( "360=.25(1440)
\n" ); document.write( "360=360\r
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\n" ); document.write( "\n" ); document.write( "Hope this helps-------ptaylor
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