\(\dfrac{4}{3}:0,8=\)\(\dfrac{2}{3}:0,1x\)

\(\dfrac{4}{3}:\dfrac{4}{5}=\dfrac{2}{3}\)\(:\dfrac{1}{10}x\)

\(\dfrac{4}{3}.\dfrac{5}{4}=\dfrac{2}{3}:\dfrac{x}{10}\)

\(\dfrac{5}{3}=\dfrac{2}{3}.\dfrac{10}{x}\)

⇒\(\dfrac{10}{x}=\dfrac{5}{3}:\dfrac{2}{3}\)\(=\dfrac{5}{3}.\dfrac{3}{2}\)\(=\dfrac{5}{2}\)

⇒\(\dfrac{10}{x}=\dfrac{5}{2}\)⇒\(x=10:\dfrac{5}{2}=10.\dfrac{2}{5}=\dfrac{20}{5}=4\)

\(\frac{4}{3}\div0,8=\frac{2}{3}\div0,1\)

\(\frac{5}{3}\ne\frac{20}{3}\)

\(\Rightarrow\frac{4}{3}\div0,8\ne\frac{2}{3}\div0,1\)

\(\frac{4}{3}:0,8=\frac{2}{3}:0,1x\\ \Leftrightarrow x=\frac{4}{3}:0,8:\frac{2}{3}.0,1=\frac{4}{3}:\frac{4}{5}:\frac{2}{3}.\frac{1}{10}\\ \Leftrightarrow x=\frac{4}{3}.\frac{5}{4}.\frac{3}{2}.\frac{1}{10}=\frac{5}{20}=\frac{1}{4}\)

\(1\dfrac{1}{3}:0,8=\dfrac{2}{3}:\left(0,1\right).x\)

\(\Rightarrow\dfrac{4}{3}:\dfrac{4}{5}=\dfrac{2}{3}:\dfrac{1}{10}.x\)

\(\Rightarrow\dfrac{4}{3}.\dfrac{5}{4}=\dfrac{2}{3}.10x\)

\(\Rightarrow\dfrac{5}{3}=\dfrac{2}{3}.10x\)

\(\Rightarrow10x=\dfrac{5}{3}:\dfrac{2}{3}\)

\(\Rightarrow10x=\dfrac{5}{2}\)

\(\Rightarrow x=\dfrac{5}{2}:10=\dfrac{1}{4}\)

Vậy \(x=\dfrac{1}{4}\)

\(1\dfrac{1}{3}:0,8=\dfrac{2}{3}:0,1x\Rightarrow\dfrac{4}{3}:\dfrac{3}{5}=\dfrac{2}{3}:\dfrac{1}{10}x\)

\(\Rightarrow\dfrac{4}{3}.\dfrac{5}{3}=\dfrac{2}{3}.10x\Rightarrow\dfrac{20}{9}=\dfrac{20}{3}x\Rightarrow x=\dfrac{1}{3}\)

Vậy...................................................

\(\frac{4}{3}:0,8=\frac{2}{3}:0,1x\)

\(\frac{5}{3}=\frac{20}{3}x\)

\(x=\frac{20}{3}:\frac{5}{3}\)

\(x=4\)

a)\(-\frac{3}{7}+x=\frac{1}{3}\)

\(x=\frac{1}{3}+\frac{3}{7}\)

\(x=\frac{16}{21}\)

b)\(\frac{3}{4}+\frac{1}{4}:x=\frac{2}{5}\)

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

\(\frac{1}{4}:x=-\frac{7}{20}\)

\(x=\frac{-7}{20}x\frac{1}{4}\)

\(x=-\frac{7}{80}\)

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

\(\Rightarrow\hept{\begin{cases}x-3=\frac{1}{2}\\x-3=\frac{-1}{2}\end{cases}}\Rightarrow\hept{\begin{cases}x=\frac{7}{2}\\x=\frac{5}{2}\end{cases}}\)

Mk bổ sung nha

c)\(1\frac{1}{3}:0,8=\frac{2}{3}:0,1x\)

\(\frac{5}{3}=\frac{2}{3}:0,1x\)

\(0,1x=\frac{2}{3}:\frac{5}{3}\)

\(0,1x=\frac{2}{5}\)

\(x=\frac{2}{5}:0,1\)

\(x=4\)

2155265bg

bn gi rõ hơn đc k , mk k hỉu