Question

2,8 : (1/5 - 3x) = 1 2/5

Answer 1

\(2,8:\left(\frac{1}{5}-3x\right)=1\frac{2}{5}\)

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

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

\(3x=\frac{-9}{10}\)

\(x=\frac{-3}{10}\)

Vậy \(x=\frac{-3}{10}\)

Answer 2

\(2,8:\left(\frac{1}{5}-3x\right)=1\frac{2}{5}\)

\(\frac{1}{5}-3x=\frac{28}{10}:\frac{7}{5}\)

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

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

\(3x=\frac{-9}{5}\)

\(x=\frac{-9}{5}:3\)

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

Answer 3

\(\frac{14}{5}:\left(\frac{1}{5}-3x\right)=\frac{12}{5}\)

\(\Rightarrow\)\(\frac{1}{5}-3x=\frac{7}{6}\)

\(\Rightarrow\)

Answer 4

\(2,8:\left(\frac{1}{5}-3x\right)=1\frac{2}{5}\)

\(\Rightarrow\frac{1}{5}-3x=2,8:\frac{7}{5}\)

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

\(\Rightarrow3x=\frac{1}{5}-2\)

\(\Rightarrow3x=-1\frac{4}{5}\)

\(\Rightarrow x=-1\frac{4}{5}:3\)

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

~Study well~