document.write( "Question 133718: How many liters of pure water (o% salt) must be added to 5 liters of an 85% salt solution to dilute it so a 68% salt solution? \n" ); document.write( "

Algebra.Com's Answer #97842 by ptaylor(2198) $\"\"$ $\"About$

You can put this solution on YOUR website!
Let x=amount of pure water needed\r
\n" ); document.write( "\n" ); document.write( "Now we know that the amount of pure salt in the water (0) plus the amount of pure salt in the 5 liters (0.85*5) has to equal the amount of pure salt in the final mixture 0.68(5+x). So our equation to solve is:\r
\n" ); document.write( "\n" ); document.write( "0.85*5=0.68(5+x) simplify
\n" ); document.write( "4.25=3.4+0.68x subtract 3.4 from each side
\n" ); document.write( "4.25-3.4=3.4-3.4+0.68x collect like terms
\n" ); document.write( "0.85=0.68x divide both sides by 0.68\r
\n" ); document.write( "\n" ); document.write( "x=1.25 liters---------------------------Amount of pure water needed\r
\n" ); document.write( "\n" ); document.write( "CK\r
\n" ); document.write( "\n" ); document.write( "0.85*5=0.68*6.25
\n" ); document.write( "4.25=4.25\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Hope this helps---ptaylor\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

\n" );