document.write( "Question 438100: Here is the question from my book.... Brad is performing an experiment in chemistry class at the University of North Carolina. He needs to mix 20 liters of 40% acid solution with a 70% acid solution to get a mixture that is 50% acid. How many liters of the 70% acid solution should he use?\r
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document.write( "I think the answer is 15 but when i tried to work it out I got confused. this is what I have so far: 20/15 = 1.333333333, 1.333333333/70= 50, 1.333333333 X 70 = 50, well anyways you see I didn't get to far.
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document.write( "thank you.
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Algebra.Com's Answer #303033 by scott8148(6628)![]() ![]() You can put this solution on YOUR website! (20)(40%) + (x)(70%) = (20 + x)(50%) \n" ); document.write( " |