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23/11/2017 at 15:18-
\(\dfrac{3}{m}=\dfrac{27}{72}\) <=> \(3\cdot72=27\cdot m\) <=> \(m=\left(3\cdot72\right):27=8\)
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Trần Quỳnh Anh 28/12/2017 at 20:24\(\dfrac{3}{m}=\dfrac{27}{72}\\\Leftrightarrow \dfrac{3.9}{9m}=\dfrac{27}{72}\\\Leftrightarrow \dfrac{27}{9m}=\dfrac{27}{72}\\ \Rightarrow9m=72\\ \Rightarrow m=8\)