document.write( "Question 828883: How many kilograms of water must be evaporated from 80kg of 20 percent salt solution to produce a 25 percent salt solution\r
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\n" ); document.write( "\n" ); document.write( "please hurry and use system of equations
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Algebra.Com's Answer #499568 by josgarithmetic(39618)\"\" \"About 
You can put this solution on YOUR website!
w=amount of water to remove through evaporation;
\n" ); document.write( "p = percent concentration starting =20
\n" ); document.write( "T= percent concentration wanted as \"target\" = 25
\n" ); document.write( "m = amount of starting mixture = 80 kilograms\r
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\n" ); document.write( "\n" ); document.write( "The variable as unknown is w.\r
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\n" ); document.write( "\n" ); document.write( "\"m%2Ap%2F%28m-w%29=T\"
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\n" ); document.write( "\"mp=T%28m-w%29\"
\n" ); document.write( "\"mp=Tm-Tw\"
\n" ); document.write( "\"Tm-Tw=mp\"
\n" ); document.write( "\"-Tw=mp-Tm\"
\n" ); document.write( "\"Tw=Tm-mp\"
\n" ); document.write( "\"highlight%28w=%28Tm-mp%29%2FT=m%28T-p%29%2FT%29\" Either expression will work.
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\n" ); document.write( "Substitute the given values to finish finding the value for w. This is in kilograms of water to evaporate.
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