document.write( "Question 838381: How much pure acid should be mixed with four gallons of a 40% acid solution in order to get a 70% acid solution? \n" ); document.write( "
Algebra.Com's Answer #505061 by ewatrrr(24785)\"\" \"About 
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document.write( "Hi,
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document.write( "Let x represent How much pure acid should be mixed
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document.write( "Set Up is:
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document.write( "        Acid = Acid
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document.write( " \".40%2A4+%2B+x+=+.70%284%2Bx%29\"   | Solve for x
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document.write( "            \"x+=+%28.30%2A4%29%2F.3\"
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document.write( "                x = 4gal pure acid should be mixed
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