document.write( "Question 485902: A pharmacist wishes to mix a solution that is 7 percent minoxidil. she has 80 ml of a 2 percent solution and wishes to add a 9 percent solution to obtain the desired 7 percent solution. How much 9 percent solution should she add? \n" ); document.write( "

Algebra.Com's Answer #332239 by Tatiana_Stebko(1539) $\"\"$ $\"About$

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Let she will add x ml of 9% solution, then she will receive (80+x) ml of 7 % solution
\n" ); document.write( " $\"80%2A0.02%2Bx%2A0.09=%2880%2Bx%29%2A0.07\"$
\n" ); document.write( " $\"1.6%2B0.09x=5.6%2B0.07x\"$
\n" ); document.write( " $\"0.09x-0.07x=5.6-1.6\"$
\n" ); document.write( " $\"0.02x=4\"$
\n" ); document.write( " $\"x=4%2F0.02\"$
\n" ); document.write( " $\"x=200\"$ ml of 9% solution \n" ); document.write( "

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