document.write( "Question 359726: A chemistry experiment calls for a 20% solution of copper sulfate. You have 150 milliliters of a 30% solution. How many milliliters of an 18% solution should you add to get a 20% solution? \n" ); document.write( "

Algebra.Com's Answer #256723 by Fombitz(32388) $\"\"$ $\"About$

You can put this solution on YOUR website!
Let $\"X\"$ be the amount of 18% solution.
\n" ); document.write( " $\"18X%2B30%28150%29=20%28X%2B150%29\"$
\n" ); document.write( " $\"18X%2B4500=20X%2B3000\"$
\n" ); document.write( " $\"2X=1500\"$
\n" ); document.write( " $\"highlight%28X=750%29\"$ ml \n" ); document.write( "

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