\(9+\frac{x}{13}-x=\frac{5}{6}\)

\(\Leftrightarrow\frac{x}{13}-x=\frac{5}{6}-9\)

\(\Leftrightarrow x\left(\frac{1}{13}-1\right)=\frac{5}{6}-\frac{54}{6}\)

\(\Leftrightarrow\frac{-12}{13}x=\frac{-50}{6}\)

\(\Leftrightarrow x=\frac{-50}{6}\div\frac{-12}{13}\)

\(\Leftrightarrow x=\frac{50}{6}\times\frac{13}{12}\)

\(\Leftrightarrow x=\frac{650}{72}=\frac{325}{36}\)

\(9+\frac{x}{13}-x=\frac{5}{6}\)

\(\Rightarrow9+\frac{x}{13}-\frac{13x}{13}=\frac{5}{6}\)

\(\Rightarrow9+\frac{x-13x}{13}=\frac{5}{6}\)

\(\Rightarrow\frac{x-13x}{13}=\frac{5}{6}-9\)

\(\Rightarrow\frac{x-13x}{13}=-\frac{49}{6}\)

\(\Rightarrow x-13x=-\frac{49}{6}\cdot13=-\frac{637}{6}\)

\(\Rightarrow-12x=-\frac{637}{6}\)

\(\Rightarrow x=-\frac{637}{6}:(-12)=\frac{637}{72}\)

\(\frac{9+x}{13-x}=\frac{5}{6}\)

\(\Rightarrow\text{ }6\left(9+x\right)=5\left(13-x\right)\)

\(\Rightarrow\text{ }54+6x=65-5x\)

\(\Rightarrow\text{ }54-65=-5x-6x\)

\(\Rightarrow\text{ }-11=-11x\)

\(\Rightarrow\text{ }x=-11\text{ : }\left(-11\right)\)

\(\Rightarrow\text{ }x=1\)

\(\frac{9+x}{13-x}=\frac{5}{6}\Rightarrow6\left(9+x\right)=5\left(13-x\right)\)

\(\Leftrightarrow11x=11\Leftrightarrow x=1\)

Ta có : \(\frac{9-x}{13-x}=\frac{5}{6}\)

\(\Leftrightarrow\left(9-x\right).6=5.\left(13-x\right)\)

\(\Leftrightarrow54-6x=65-5x\)

\(\Leftrightarrow6x-5x=54-65\)

\(\Leftrightarrow-1x=-11\)

\(\Leftrightarrow x=-11\)

Vậy x = -11 

\(\frac{9+x}{13-x}=\frac{5}{6}\)

\(\Rightarrow\left(9-x\right).6=5.\left(13-x\right)\)

\(\Rightarrow54-6x=5\left(13-x\right)\)\(\Rightarrow5x-6x=54-65=-11\)

\(\Rightarrow x=-11\)

1, 476 : x =28

               x=476 : 28

               x=17

Vậy x= 17

,2, x : 26 = 39

     x=39 . 26

     x=1014

Vậy x= 1014

Thôi nhiều quá mình không trả lời được

~Thôi chúc bạn học giỏi~

1)476:x=28

x=476:28

x=17

2)x:26=39

x=39x26

x=1014

476 : x = 68

x.          = 476 : 68 

x.          = 7

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   

hc ngiu thế eim anh lười giải lắm =))))

1: x=3/4-1/2=3/4-2/4=1/4

2: x-1/5=2/11

=>x=2/11+1/5=21/55

3: x-5/6=16/42-8/56

=>x-5/6=8/21-4/28=5/21

=>x=5/21+5/6=15/14

4: x/5=5/6-19/30

=>x/5=25/30-19/30=6/30=1/5

=>x=1

5: =>|x|=1/3+1/4=7/12

=>x=7/12 hoặc x=-7/12

6: x=-1/2+3/4

=>x=3/4-1/2=1/4

11: x-(-6/12)=9/48

=>x+1/2=3/16

=>x=3/16-1/2=-5/16

1)x= 1/4

2)x= 2/11+ 1/5

   x= 21/55

3)x - 5/6 = 5/21

   x         = 5/21+5/6

   x         = 15/14

4)x/5 = 5/6 + -19/30

   x:5 = 1/5

   x    = 1/5.5

   x    = 1

5) |x| - 1/4 = 6/18

    |x|           = 6/18 - 1/4

    |x|            =7/12

⇒x= 7/12 hoặc -7/12

6)x = -1/2 +3/4

   x= 1/4

7) x/15 = 3/5 + -2/3

   x:15  = -1/15

  x        = -1/15. 15

  x        = -1

8)11/8 + 13/6 = 85/x  

       85/24      = 85/x

  ⇒      x           = 24

9) x - 7/8 = 13/12

   x          = 13/12 + 7/8

   x          = 47/24

10)x - -6/15 = 4/27  

     x            = 4/27 + (-6/15)

    x             = -34/135

11) -(-6/12)+x = 9/48

                    x= 9/48 - 6/12

                    x = -5/16

12) x - 4/6 = 5/25 + -7/15

      x -4/6  =  -4/15

     x           = -4/15 + 4/6

    x             = 2/5

\(\frac{9+x}{13-x}=\frac{5}{6}\)

=> (9 + x).6 = 5.(13 - x)

=> 54 + 6x = 65 - 5x

=> 6x + 5x = 65 - 54

=> 11x = 9

=> x = 9/11

x=1 nha bạn

\(\frac{9+x}{13-x}=\frac{5}{6}\)

\(\left(9+x\right)\times6=\left(13-x\right)\times5\)

\(54+6\times x=65-5\times x\)

\(6\times x+5\times x=65-54\)

\(11\times x=11\)

\(x=1\)

ngu zậy bn