\(\frac{4}{5}:1\frac{2}{5}=2\frac{2}{5}:x\)
\(=\frac{4}{7}=2\frac{2}{5}:x\)
\(\Rightarrow x=2\frac{2}{5}:\frac{4}{7}=\frac{21}{5}\)
\(\Rightarrow x=\frac{21}{5}\)
Ủng hộ mk nka!^_^
Ta có: \(\frac{4}{5}\)/ \(1\frac{2}{5}\)= \(2\frac{2}{5}\)/ x.
Chuyển hỗn số thành phân số: \(\frac{4}{5}\)/\(\frac{7}{5}\)= \(\frac{12}{5}\)/x.
\(\frac{4}{7}\)=\(\frac{12}{5}\)/X
x=\(\frac{12}{5}\)/\(\frac{4}{7}\)
x=4,2