d.\(\dfrac{17}{5}\)

a,b đều là 1

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

\(x:\dfrac{1}{2}=\dfrac{29}{12}\)

      \(x=\dfrac{29}{12}\)x\(\dfrac{1}{2}\)

      \(x=\dfrac{29}{24}\)

Hai lần lấy số m vải là:

       \(\dfrac{1}{4}+\dfrac{1}{6}=\dfrac{5}{12}\)(m)

           Đáp số :\(\dfrac{5}{12}\) m vải

lx

\(7:\dfrac{2}{3}=7\)x\(\dfrac{3}{2}=\dfrac{21}{2}\)

\(\dfrac{5}{4}\)x\(x=\dfrac{3}{8}\)

     \(x=\dfrac{3}{8}:\dfrac{5}{4}\)

     \(x=\dfrac{3}{10}\)

\(\dfrac{2}{3}\) rồi sao nữa ạ

là phân số : \(\dfrac{9}{11}\) nha

\(\dfrac{1}{6},\dfrac{2}{3},\dfrac{6}{4}\)