Question

4/5 + 5/7 : x = 1/6

Answer 1

Đề yêu cầu gì em?

Answer 2

\(\dfrac{4}{5}+\dfrac{5}{7}:x=\dfrac{1}{6}\\ \dfrac{5}{7}:x=\dfrac{1}{6}-\dfrac{4}{5}\\ \dfrac{5}{7}:x=-\dfrac{19}{30}\\ x=\dfrac{5}{7}:\left(-\dfrac{19}{30}\right)\\ x=\dfrac{5}{7}\times\dfrac{-30}{19}=-\dfrac{150}{133}\)

Answer 3

\(\dfrac{4}{5}\)+\(\dfrac{5}{7}\):x=\(\dfrac{1}{2}\)

     \(\dfrac{5}{7}\):x=\(\dfrac{1}{2}\)-\(\dfrac{4}{5}\)

     \(\dfrac{5}{7}\):x=\(-\dfrac{3}{10}\)

         x=\(\dfrac{5}{7}\):(\(-\dfrac{3}{10}\))

         x=-\(\dfrac{50}{21}\)