\(\dfrac{3}{5}+\dfrac{a}{b}=5\) \(\dfrac{a}{b}-\dfrac{4}{7}=\dfrac{5}{6}\) \(\dfrac{2}{3}\) x \(\dfrac{a}{b}=\dfrac{3}{5}\)
\(\dfrac{a}{b}:\dfrac{2}{7}=3+\dfrac{2}{3}\) \(\dfrac{7}{5}-\dfrac{a}{b}=\dfrac{2}{5}:2\)
\(\dfrac{3}{5}:\dfrac{a}{b}=\dfrac{2}{7}\) ÉT O ÉT