Question

Tìm x:

\(\left(\dfrac{2x}{5}-1\right):\left(-5\right)=\dfrac{1}{7}\)

Answer 1

\(\left(\dfrac{2x}{5}-1\right):\left(-5\right)=\dfrac{1}{7}\)

\(\Leftrightarrow\dfrac{2x}{5}-1=-\dfrac{5}{7}\)

\(\Leftrightarrow\dfrac{2x}{5}=\dfrac{2}{7}\)

\(\Leftrightarrow2x=\dfrac{10}{7}\)

\(\Rightarrow x=\dfrac{5}{7}\)

Answer 2

\(\left(\dfrac{2x}{5}-1\right)\):\(\left(-5\right)\)=\(\dfrac{1}{7}\)

\(\dfrac{2x}{5}-1=-\dfrac{5}{7}\)

\(\dfrac{2x}{5}=\dfrac{2}{7}\)

\(2x=\dfrac{10}{7}\)

\(x=\dfrac{5}{7}\)