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OpenStudy (anonymous):

??????????????????????????????

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OpenStudy (anonymous):

What's the question?

OpenStudy (anonymous):

Show an equation and a solution for the problem. Arnold needs a 25% solution of nitric acid. He has 20 ml of a 30% solution. How many ml of a 15% solution should he add to obtain the required 25% solution?

OpenStudy (anonymous):

i got the answer

OpenStudy (anonymous):

20(.30)+.15x=.25(20+x) This the equation

OpenStudy (anonymous):

The answer would 7.5 ml of a 15% solution

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OpenStudy (zarkon):

10

OpenStudy (anonymous):

.

OpenStudy (anonymous):

oh ya sorry x=10

OpenStudy (anonymous):

Thanks You Guysss !!

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