document.write( "Question 978399: Two hundred liters of a liquid that contains 45% acid is mixed with 300 liters of another liquid. The resulting liquid is 21% acid. Find the percent of acid in the 300 liters liquid. \n" ); document.write( "
Algebra.Com's Answer #599808 by josgarithmetic(39620)\"\" \"About 
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Let x be the unknown percent concentration of acid for the 300 liters part.
\n" ); document.write( "\"%28200%2A45%2B300%2Ax%29%2F%28200%2B300%29=21\"
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