Question

Tìm x : 2/3 + 4/7 : x = 1/6

Answer 1

\(\dfrac{2}{3}+\dfrac{4}{7}\times\dfrac{1}{x}=\dfrac{1}{6}\)

\(\dfrac{4}{7}\times\dfrac{1}{x}=\dfrac{1}{6}-\dfrac{2}{3}\)

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

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

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

\(\dfrac{1}{x}=-\dfrac{7}{8}\)

\(x=-\dfrac{8}{7}\)

Answer 2

`2/3+4/7:x=1/6`

`4/7:x=1/6-2/3`

`4/7:x=-1/2`

`x=4/7:(-1/2)`

`x=-8/7`

Answer 3

\(\dfrac{2}{3}+\dfrac{4}{7}:x=\dfrac{1}{6}\)

\(=>\dfrac{4}{7}:x=\dfrac{1}{6}-\dfrac{2}{3}=\dfrac{1}{6}-\dfrac{4}{6}=-\dfrac{3}{6}=-\dfrac{1}{2}\)

\(=>x=\dfrac{4}{7}:\left(-\dfrac{1}{2}\right)=-\dfrac{8}{7}\)