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need help! algebra question (answerandexplanation?) please!

label Algebra
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A 200 mL solution of sugar water has a sugar concentration of 40%.  How many mL of pure water must be added to the solution to reduce the concentration to 10%?

Jan 6th, 2015

if 200ml= 40%

  ?=10%

this will give us  (40x200)/10

= 800ml

the number of ml to be added will be

(800-200)ml= 600ml of pure water should be added.

Jan 6th, 2015

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Jan 6th, 2015
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Jan 6th, 2015
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