Question

bai 1

tim x :

a) x* 2/5 = 4/7 : 3/2                                                                                                        b)  12/7  :x +2/3 = 7/5

ai nhanh nhat  dung nhat minh tich cho

 

 

Answer 1

a)     x.2/5=4/7:3/2

      x.2/5=8/21

     x      =8/21:2/5

     x     =20/21

vay x=20/21

b) 12/7:x+2/3=7/5

    12/7:x       =7/5-2/3=11/15

           x       =12/7:11/15

           x      =180/77

VAy x=180/77

Answer 2

\(x.\frac{2}{5}=\frac{4}{7}:\frac{3}{2}\)

\(\Rightarrow x.\frac{2}{5}=\frac{8}{21}\)

\(\Rightarrow x=\frac{8}{21}:\frac{2}{5}\)

\(\Rightarrow x=\frac{40}{42}\)

tíc mình nha

Answer 3

a

x . 2/5 = 4/7 : 3/2

x . 2/5=4/7x2/3

x.2/5=8/21

x=8/21 : 2/5

x=8/21 x 5/2

x=40/42

b

12/7 : x + 2/3 = 7/5

12/7 : x = 7/5 - 2/3

12/7 : x=

Answer 4

\(x.\frac{2}{5}=\frac{4}{7}:\frac{3}{2}\)

\(\Rightarrow x.\frac{2}{5}=\frac{8}{21}\)

\(\Rightarrow x=\frac{8}{21}:\frac{2}{5}\)

\(\Rightarrow x=\frac{40}{42}\)