NC

Tìm x

10/3. 1/2 -(1/2. x- 1/3) + 1/5= 3/5: 1/2

HM
4 tháng 8 2023 lúc 16:14

\(\dfrac{10}{3}\cdot\dfrac{1}{2}-\left(\dfrac{1}{2}x-\dfrac{1}{3}\right)+\dfrac{1}{5}=\dfrac{3}{5}:\dfrac{1}{2}\\ \Leftrightarrow\dfrac{1}{2}x-\dfrac{1}{3}=\dfrac{10}{3}\cdot\dfrac{1}{2}+\dfrac{1}{5}-\dfrac{3}{5}\cdot2\\ \Leftrightarrow\dfrac{1}{2}x=1\\ \Leftrightarrow x=2\)

Vậy x=2.

Bình luận (2)
GD

\(\dfrac{10}{3}.\dfrac{1}{2}-\left(\dfrac{1}{2}.x-\dfrac{1}{3}\right)+\dfrac{1}{5}=\dfrac{3}{5}:\dfrac{1}{2}\\ \dfrac{5}{3}-\left(\dfrac{1}{2}.x-\dfrac{1}{3}\right)+\dfrac{1}{5}=\dfrac{6}{5}\\ \dfrac{5}{3}-\left(\dfrac{1}{2}.x-\dfrac{1}{3}\right)=\dfrac{6}{5}-\dfrac{1}{5}=1\\ \dfrac{1}{2}.x-\dfrac{1}{3}=\dfrac{5}{3}-1=\dfrac{2}{3}\\ \dfrac{1}{2}.x=\dfrac{2}{3}+\dfrac{1}{3}=1\\ x=1:\dfrac{1}{2}=2\\ Vậy:x=2\)

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NT
4 tháng 8 2023 lúc 16:16

\(\dfrac{10}{3}.\dfrac{1}{2}-\left(\dfrac{1}{2}x-\dfrac{1}{3}\right)+\dfrac{1}{5}=\dfrac{3}{5}:\dfrac{1}{2}\)

\(\Rightarrow\dfrac{5}{3}-\left(\dfrac{1}{2}x-\dfrac{1}{3}\right)+\dfrac{1}{5}=\dfrac{3}{5}.\dfrac{2}{1}\)

\(\Rightarrow\dfrac{5}{3}-\dfrac{1}{2}x+\dfrac{1}{3}+\dfrac{1}{5}=\dfrac{6}{5}\)

\(\Rightarrow\dfrac{5}{3}+\dfrac{1}{3}-\dfrac{1}{2}x=\dfrac{6}{5}-\dfrac{1}{5}\)

\(\Rightarrow2-\dfrac{1}{2}x=1\Rightarrow\dfrac{1}{2}x=1\Rightarrow x=1:\dfrac{1}{2}=1.\dfrac{2}{1}=2\)

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