document.write( "Question 753509: How many ml of 30% acid should be added to pure acid to make 40 ml of 70% acid? \n" ); document.write( "
Algebra.Com's Answer #458423 by josgarithmetic(39618)\"\" \"About 
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How many ml of 30% acid should be added to pure acid to make 40 ml of 70% acid?\r
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\n" ); document.write( "\n" ); document.write( "Let u = ml. of 30% acid
\n" ); document.write( "Let v = ml. of 100% acid.\r
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\n" ); document.write( "\n" ); document.write( "\"%2830u%2B100v%29%2F40=70\" and \"u%2Bv=40\"\r
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\n" ); document.write( "\n" ); document.write( "Solve for u and v.
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