Question

\(\left(\frac{3}{5}x-\frac{2}{3}x-x\right)\cdot\frac{1}{7}=\frac{-5}{21}\)

Answer 1

\(\Leftrightarrow x\left(\frac{3}{5}-\frac{2}{3}-1\right).\frac{1}{7}=-\frac{5}{21}\)

\(\Rightarrow x.\frac{-16}{15}.\frac{1}{7}=-\frac{5}{21}\)

\(\Rightarrow\frac{-16}{105}x=-\frac{5}{21}\)

\(\Rightarrow x=\frac{25}{16}\)

tíc mình nha

Answer 2

\(\left(\frac{3}{5}x-\frac{2}{3}x-x\right).\frac{1}{7}=\frac{-5}{21}\)

\(\frac{3}{5}x-\frac{2}{3}x-x=\frac{-5}{21}:\frac{1}{7}\)

\(\frac{3}{5}x-\frac{2}{3}x-x=\frac{-5}{3}\)

\(x\left(\frac{3}{5}-\frac{2}{3}-1\right)=\frac{-5}{3}\)

\(x.\frac{-16}{15}=\frac{-5}{3}\)

\(x=\frac{25}{16}\)

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