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QHello could you help me with this question

Hello could you help me with this question?


We have 500 pounds of plastic with 10% glass mixed in it. We also have 100 pounds of plastic with 30% of glass in it. How many pounds of plastic with 15% glass can you make with two materials?


Hint: You will have some 10% glass material left over.


The answer is supposed to be 400lbs, but I need to show the work.


Thanks!

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#1kristisparklezAnswered at 2013-03-09 04:17:32
(30%)(100) + (10%)(x) = (15%)(100 + x) 3000 + 10x = 1500 + 15x 1500 = 5x ___ 300 = x 300 lb of 10% along with 100 lb of 30% makes 400 lb of 15%
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