Question

\(3\left(x-\frac{1}{5}\right)-7\left(\frac{5}{14}-3\right)=20\)

\(\frac{2}{3}-\frac{1}{5}\left(x-\frac{1}{4}\right)=\frac{3}{2}-\frac{1}{4}\)

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Thanks trước nha

Answer 1

\(3.\left(x-\frac{1}{5}\right)-7.\left(\frac{5}{14}-3\right)=20\)

\(3.\left(x-\frac{1}{5}\right)-7.\frac{-37}{14}=20\)

\(3.\left(x-\frac{1}{5}\right)-\frac{-37}{2}=20\)

\(3.\left(x-\frac{1}{5}\right)=20+\frac{-37}{2}\)

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

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

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

\(x=\frac{1}{2}+\frac{1}{5}\)

\(x=\frac{7}{10}\)

Answer 2

Giải tiếp đi bạn

Answer 3

\(\frac{2}{3}-\frac{1}{5}.\left(x-\frac{1}{4}\right)=\frac{3}{2}-\frac{1}{4}\)

\(\frac{2}{3}-\frac{1}{5}.\left(x-\frac{1}{4}\right)=\frac{5}{4}\)

\(\frac{1}{5}.\left(x-\frac{1}{4}\right)=\frac{2}{5}-\frac{5}{4}\)

\(\frac{1}{5}.\left(x-\frac{1}{4}\right)=\frac{-17}{20}\)

\(x-\frac{1}{4}=\frac{-17}{20}:\frac{1}{5}\)

\(x-\frac{1}{4}=\frac{-17}{4}\)

\(x=\frac{-17}{4}+\frac{1}{4}\)

\(x=-4\)