document.write( "Question 198989: How much 15% acid must you add to 4 liters of 40% acid to obtain a mixture that is 25% acid? \n" ); document.write( "
Algebra.Com's Answer #149476 by RAY100(1637)\"\" \"About 
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Let x = amt of acid
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\n" ); document.write( ".4(4) + .15x = .25(4+x)
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\n" ); document.write( "1.6 + .15 x = 1 + .25x
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\n" ); document.write( ".6 = .1x
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\n" ); document.write( "x= 6 liters
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\n" ); document.write( ".4(4) + .15(6) = .25(4 + 6)
\n" ); document.write( "1.6 + .9 = 2.5 ,,,,,ok
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