\(\left(x-\dfrac{2}{7}.\dfrac{4}{8}\right)-\dfrac{3}{5}=\dfrac{1}{2}\\ \left(x-\dfrac{8}{56}\right)=\dfrac{1}{2}+\dfrac{3}{5}\\ \left(x-\dfrac{1}{7}\right)=\dfrac{5+3.2}{10}\\ x-\dfrac{1}{7}=\dfrac{11}{10}\\ x=\dfrac{11}{10}+\dfrac{1}{7}\\ x=\dfrac{11.7+10}{70}\\ x=\dfrac{87}{70}\)
\(\left(x-\dfrac{2}{7}\times\dfrac{4}{8}\right)-\dfrac{3}{5}=\dfrac{1}{2}\\ \left(x-\dfrac{1}{7}\right)-\dfrac{3}{5}=\dfrac{1}{2}\\ x-\dfrac{1}{7}=\dfrac{1}{2}+\dfrac{3}{5}\\ x-\dfrac{1}{7}=\dfrac{5}{10}+\dfrac{6}{10}\\ x-\dfrac{1}{7}=\dfrac{11}{10}\\ x=\dfrac{11}{10}+\dfrac{1}{7}\\ x=\dfrac{77}{70}+\dfrac{10}{70}=\dfrac{87}{70}\)
