a: =>x=3/7+3/5=15/35+21/35=36/35

b: =>x/35=4/5-5/7=28/35-25/35=3/35

=>x=3

c: =>x<3/4+8/4=11/4

=>\(x\in\left\{0;1;2;3\right\}\)

d: =>5/3<x<5/6+24/6=29/6

=>\(x\in\left\{2;3;4\right\}\)

e: =>x<10/12-9/12=1/12

=>x=0

f: =>2/3<x<12/6-5/6=7/6

=>x=1

x:3/4 = 5/6

x = 5/8

b) x -2/3 = 4/6 = 2/3

x = 4/3

c) 7/10 : x = 7/2

x = 1/5

d) 5/8 : x = 5

x = 1/8

X : 3/4=5/6

       X=5/6x3/4

       X=5/8

X - 2/3=4/6

       X=4/6+2/3

       X=4/3

7/10 : X=7/2

          X=7/10:7/2

         X=1/5

5/8 : X= 5

        X=5/8:5

        X=1/8

K MK NHAAA

Giúp

\(\dfrac{3}{7}\times x=\dfrac{1}{3}\)

\(x=\dfrac{1}{3}:\dfrac{3}{7}\)

\(x=\dfrac{7}{9}\)

\(x:\dfrac{6}{8}=\dfrac{2}{5}\)

\(x=\dfrac{2}{5}\times\dfrac{6}{8}\)

\(x=\dfrac{6}{20}=\dfrac{3}{10}\)

\(x-\dfrac{2}{3}=\dfrac{5}{6}\)

\(x=\dfrac{5}{6}+\dfrac{2}{3}\)

\(x=\dfrac{9}{6}=\dfrac{3}{2}\)

\(x-\dfrac{2}{5}-\dfrac{4}{35}=\dfrac{1}{7}\)

\(x=\dfrac{1}{7}+\dfrac{4}{35}+\dfrac{2}{5}\)

\(x=\dfrac{23}{35}\)

.

\(\frac{2}{7}\cdot\frac{x}{3}\cdot\frac{4}{5}=\frac{2}{3}\cdot\frac{4}{5}\cdot\frac{6}{7}\)

\(\frac{2}{7}\cdot\frac{x}{3}\cdot\frac{4}{5}=\frac{16}{35}\)

\(\Rightarrow\frac{16}{35}:\frac{4}{5}:\frac{2}{7}\)

\(\Rightarrow2\)

Mà : \(2=\frac{x}{3}\)

Suy ra số \(x\)cần tìm là:

\(2\cdot3=6\)

    Đáp số : \(6\)

a)x : 2/5 = 3/7 

= \(\dfrac{3}{7}x\dfrac{2}{5}=\dfrac{6}{35}\)

b) 6/5 - x = 7/8

\(x=\dfrac{6}{5}-\dfrac{7}{8}\)

\(x=\dfrac{13}{40}\)

a) x : 2/5 = 3/7

           x   = 3/7 x 2/5

           x   = 6/35

b) 6/5 - x = 7/8

             x = 6/5 - 7/8

             x = 13/40

#Tick cho mik nha

# học tốt :3

X : 2/3 = 6/7 
X = 6/7 x 2/3 
X = 4/7

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

#DatNe

6/7 - x = 2/3

        x = 6/7 - 2/3

        x = 4/21

x : 6/7 - x = 2/3

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

x : ( 6/7 - 1 ) = 2/3

x : -1/7   = 2/3

x            = 2/3 x -1/7

x            = -2/21

tk mk nhé

X + 5/9 = 4/3   

X = 4/3 - 5/9

X = 7/9 

X - 4/9 = 1/2       

X = 1/2 + 4/9

X =  17/18 

6/13 + X = 7/6 

X = 7/6 - 6/13

X = 55/78

13/5 - X = 5/6   
X = 13/5 - 5/6

X= 53/30

X + 5/9 = 4/3 

x           = 4/3 - 5/9

x           =   7/9

  X - 4/9 = 1/2   

  x          = 1/2 + 4/9 

  x          =   17/18        

6/13 + X = 7/6     

            x = 7/6 - 6/13 

            x -  55/78

13/5 - X = 5/6 

          x  = 13/5 - 5/6

          x  =   53/30   

Tìm x:

\(a.\dfrac{35}{28}-x=\dfrac{5}{14}\\ x=\dfrac{35}{28}-\dfrac{5}{14}\\ x=\dfrac{25}{28}\\ b.\dfrac{6}{7}\times x=\dfrac{2}{3}\\ x=\dfrac{2}{3}:\dfrac{6}{7}\\ x=\dfrac{7}{9}\\ c.x\times7=\dfrac{3}{4}\\ x=\dfrac{3}{4}:7\\ x=\dfrac{3}{28}\\ d.2:x-\dfrac{1}{3}=\dfrac{2}{5}\\ 2:x=\dfrac{2}{5}+\dfrac{1}{3}\\ 2:x=\dfrac{11}{15}\\ x=2:\dfrac{11}{15}\\ x=\dfrac{30}{11}.\)

\(a,\dfrac{35}{28}-x=\dfrac{5}{14}\)

\(x=\dfrac{35}{28}-\dfrac{5}{14}\)

\(x=\dfrac{25}{28}\)

\(b,\dfrac{6}{7}\times x=\dfrac{2}{3}\)

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

\(x=\dfrac{7}{9}\)

\(c,x\times7=\dfrac{3}{4}\)

\(x=\dfrac{3}{4}:7\)

\(x=\dfrac{3}{28}\)

\(d,2:x-\dfrac{1}{3}=\dfrac{2}{5}\)

\(2:x=\dfrac{2}{5}+\dfrac{1}{3}\)

\(2:x=\dfrac{11}{15}\)

\(x=2:\dfrac{11}{15}\)

\(x=\dfrac{30}{11}\)

#YVA