Đề là tìm x?
\(x-\frac{4}{5}:\frac{2}{7}=\frac{8}{35}\)
\(x-\frac{4}{5}\times\frac{7}{2}=\frac{8}{35}\)
\(x-\frac{4\times7}{5\times2}=\frac{8}{35}\)
\(x-\frac{28}{10}=\frac{8}{35}\)
\(x=\frac{8}{35}+\frac{28}{10}\)
\(x=\frac{16}{70}+\frac{196}{70}\)
\(x=\frac{16+196}{70}\)
\(x=\frac{212}{70}=\frac{106}{35}\)
Vậy x = 106/35