Question

9/10x - 2/5 =1/5

Answer 1

9/10.x=1/5+2/5

9/10.x=3/5

x=3/5:9/10

x=3/5.10/9

x=2/3

Answer 2

`9/10 x - 2/5 = 1/5`

`9/10 x = 3/5`

`=> x = 3/5 : 9/10`

`=> x = 3/5 xx 10/9`

`=> x = 2/3`

Answer 3

 đề là tìm x nha mình quên ghi

 

Answer 4

9/10x - 2/5 =1/5

\(\dfrac{9}{10}x=\dfrac{1}{5}+\dfrac{2}{5}\)

\(\dfrac{9}{10}x=\dfrac{3}{5}\)

\(x=\dfrac{3}{5}:\dfrac{9}{10}\)

\(x=\dfrac{3}{5}x\dfrac{10}{9}\)

\(x=\dfrac{2}{3}\)