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A certain drug is made from only two ingredients: compound A and compound B. There are 7 milliliters of compound A used for every 5 milliliters of compound B. If a chemist wants to make 612 milliliters of the drug, how many milliliters of compound A are needed?

 Oct 5, 2020
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there are 7 out of (7+5) ml of A used  :     7/12

7/12 * 612 = .........   ml of A

 Oct 5, 2020

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