Question

[Phan Trần Tường Vy]

Bài 1 , tìm x biết 

x . 3/7 = 2/3

x : 8/11 = 11/3

4/7 . x - 2/3 = 1/5

Answer 1

[⭐Hannie⭐]

`x . 3/7 = 2/3`

`=>x= 2/3 : 3/7`

`=>x= 2/3 . 7/3`

`=>x=14/9`

`-----------`

`x : 8/11 = 11/3`

`=>x= 11/3 . 8/11`

`=>x= 88/33`

`=>x=8/3`

`-----------`

`4/7 . x - 2/3 = 1/5`

`=> 4/7 . x = 1/5 +2/3`

`=>4/7 . x =3/15 + 10/15`

`=>4/7 . x =13/15`

`=>x= 13/15 : 4/7`

`=>x= 13/15 xx 7/4`

`=>x= 91/60`

Answer 2

[Akai Haruma]

Lời giải:

$x.\frac{3}{7}=\frac{2}{3}$

$x=\frac{2}{3}: \frac{3}{7}=\frac{14}{9}$

-----------

$x: \frac{8}{11}=\frac{11}{3}$

$x=\frac{11}{3}.\frac{8}{11}=\frac{8}{3}$

-----------

$\frac{4}{7}x-\frac{2}{3}=\frac{1}{5}$

$\frac{4}{7}x=\frac{2}{3}+\frac{1}{5}=\frac{13}{15}$

$x=\frac{13}{15}: \frac{4}{7}=\frac{91}{60}$