Question

X + \(\dfrac{4}{5}\) = \(\dfrac{4}{5}:\dfrac{8}{15}\)                                     X : \(\dfrac{4}{3}=\dfrac{2}{5}+3\) 

gấp lắm x2   ↑² 

Answer 1

` x + 4/5 = 4/5 : 8/15`

` x + 4/5 = 4/5 xx 15/8`

` x + 4/5 = 3/2`

` x = 3/2 - 4/5`

` x =7/10`

 

` x : 4/3 = 2/5 + 3`

` x : 4/3 = 17/5`

` x = 17/5 xx 4/3`

` x = 68/15`

Answer 2

\(x+\dfrac{4}{5}=\dfrac{4}{5}:\dfrac{8}{15}\)

\(x+\dfrac{4}{5}=\dfrac{4}{5}.\dfrac{15}{8}\)

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

\(x=\dfrac{3}{2}-\dfrac{4}{5}\)

\(x=\dfrac{15}{10}-\dfrac{8}{10}\)

\(x=\dfrac{7}{10}\)

 

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

\(x:\dfrac{4}{3}=\dfrac{2}{5}+\dfrac{15}{5}\)

\(x:\dfrac{4}{3}=\dfrac{17}{5}\)

\(x=\dfrac{17}{5}.\dfrac{4}{3}\)

\(x=\dfrac{68}{15}\)

Dấu "." là dấu "x" nha

Answer 3

1 . 

=> X = \(\left(\dfrac{4}{5}:\dfrac{8}{15}\right)-\dfrac{4}{5}=\dfrac{7}{10}\)

2 . 

=> \(X=\left(\dfrac{2}{5}+3\right)\times\dfrac{4}{3}=\dfrac{68}{15}\)

Answer 4

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

\(x=\dfrac{3}{2}-\dfrac{4}{5}\)

\(x=\dfrac{7}{10}\)

 

\(x:\dfrac{4}{3}=\dfrac{17}{5}\)

\(x=\dfrac{17}{5}\times\dfrac{4}{3}\)

\(x=\dfrac{68}{15}\)