Question

2/7-3/7:x=1/5

Answer 1

\(\dfrac{2}{7}-\dfrac{3}{7}:x=\dfrac{1}{5}\\ \dfrac{3}{7}:x=\dfrac{2}{7}-\dfrac{1}{5}\\ \dfrac{3}{7}:x=\dfrac{3}{35}\\ x=\dfrac{3}{7}:\dfrac{3}{35}\\ x=5\)

Answer 2

Ta có: \(\dfrac{2}{7}-\dfrac{3}{7}:x=\dfrac{1}{5}\)

\(\Leftrightarrow\dfrac{3}{7}:x=\dfrac{2}{7}-\dfrac{1}{5}=\dfrac{10}{35}-\dfrac{7}{35}=\dfrac{3}{35}\)

hay \(x=5\)

Vậy: x=5

Answer 3

Giải:

2/7-3/7:x=1/5

      3/7:x=2/7-1/5

      3/7:x=3/35

            x=3/7:3/35

            x=5

Chúc bạn học tốt!