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To solve 5/7 - 2/n = 1/21
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To solve 5/7 - 2/n = 1/21

User Nick Walker
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1 Answer

4 votes

Answer:

-2/n=1/21-5/7

-2/n= -2/3

cross multiple

-2×3=n×-2

-6/-2=-2n/-2

n=3

User Cachique
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