document.write( "Question 880284: A chemist has 300 mL of a solution that is half acid. She needs a solution that is 90% acid. How many mL of acid should she add? \n" ); document.write( "
Algebra.Com's Answer #531295 by josgarithmetic(39616)\"\" \"About 
You can put this solution on YOUR website!
\"300%2A50%2Bv%2A100=%28v%2B300%29%2A90\" and solve for v.\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "This lesson tells how this mixture problem works.
\n" ); document.write( "
\n" );