document.write( "Question 727677: I have 550ml of a 70% solution. I want to make it an 80% solution. How many mls of a 90% solution must I add to the 70% to make it 80%? \n" ); document.write( "
Algebra.Com's Answer #445157 by josgarithmetic(39617)\"\" \"About 
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Let v = ml.s of the 90% solution to add.\r
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\n" ); document.write( "\n" ); document.write( "\"highlight%28%28550%2A70%2Bv%2A90%29%2F%28550%2Bv%29=80%29\".
\n" ); document.write( "Solve for v.
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