document.write( "Question 796647: A 90kg solution has 10% salt. How much water must be evaporated to leave 20% salt? \n" ); document.write( "

Algebra.Com's Answer #481460 by josgarithmetic(39617) $\"\"$ $\"About$

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Evaporate w kilograms of water.\r
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\n" ); document.write( "\n" ); document.write( " $\"highlight%2890%2A10%2F%2890-w%29=20%29\"$
\n" ); document.write( " $\"20%2890-w%29=9%2A100\"$
\n" ); document.write( " $\"2%2890-w%29=90\"$
\n" ); document.write( " $\"180-2w=90\"$
\n" ); document.write( " $\"180-90=2w\"$
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\n" ); document.write( " $\"highlight%28w=45%29\"$ kilograms \n" ); document.write( "

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