Question

Tìm x :

\(\dfrac{x}{2}-(\dfrac{3x}{5}-\dfrac{13}{5})=(\dfrac{7}{5}+\dfrac{7}{10}x) \)

Ai làm được mình tick cho

Answer 1

Phá ngoặc ra rồi tính ! Bài này thằng rốt nhất lớp tôi cx bt lm

Answer 2

\(\dfrac{x}{2}-\left(\dfrac{3x}{5}-\dfrac{13}{5}\right)=\left(\dfrac{7}{5}+\dfrac{7}{10}x\right)\)

\(\Rightarrow\dfrac{x}{2}-\dfrac{3x}{5}+\dfrac{13}{5}=\dfrac{7}{5}+\dfrac{7x}{10}\)

\(\Rightarrow\dfrac{x}{2}-\dfrac{3x}{5}-\dfrac{7x}{10}=\dfrac{7}{5}-\dfrac{13}{5}\)

\(\Rightarrow\dfrac{5x}{10}-\dfrac{6x}{10}-\dfrac{7x}{10}=-\dfrac{6}{5}\)

\(\Rightarrow\dfrac{-4x}{5}=-\dfrac{6}{5}\)

\(\Rightarrow-4x=-6\)

\(\Rightarrow x=\dfrac{3}{2}\)