document.write( "Question 520647: How many milliliters of a 12% acid solution and how many milliliters of a 4% acid solution must be mixed to obtain 40ml of a10% acid solution? \n" ); document.write( "
Algebra.Com's Answer #346196 by mananth(16946)\"\" \"About 
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---------percent ---------------- quantity
\n" ); document.write( "Acid type I 12 ---------------- x ml
\n" ); document.write( "Acid type II 4 ------ 40 - x ml
\n" ); document.write( "Mixture 10.00% ---------------- 40
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\n" ); document.write( "12 x + 4 ( 40 - x ) = 10 * 40
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\n" ); document.write( "12x+160 -4x=400
\n" ); document.write( "12 x-4x =400-160
\n" ); document.write( "8 x = 240
\n" ); document.write( "/ 8
\n" ); document.write( " x = 30 ml 12.00% Acid type I
\n" ); document.write( " 10 ml 4.00% Acid type II
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