document.write( "Question 788888: You need a 90% alcohol solution. On hand, you have a 30 mL of a 40% alcohol mixture. How much pure alcohol will you need to add to obtain the desired solution? \n" ); document.write( "

Algebra.Com's Answer #478692 by josgarithmetic(39618) $\"\"$ $\"About$

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v = volume in milliliters of the pure alcohol to add.\r
\n" ); document.write( "\n" ); document.write( " $\"%2830%2A40%2Bv%2A100%29%2F%28v%2B30%29=90\"$ \n" ); document.write( "

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