231-(x-6)=1339:13

231-(x-6) =103

x -6 =  231-103

x-6 = 128

x=128+6

=>x =134

li-ke

231 – (x- 6) = 1339 : 13

231 – (x – 6) = 103

x – 6 = 231 – 103

x – 6 = 128

x = 128 + 6

x = 134

Vậy x = 134

a) 10 + 2x = 16.4 : 4

=> 10 + 2x = 16

2x = 16 - 10 

2x = 6

x = 6:2 = 3

b) 231 - ( x - 6 ) = 1339 : 13

=> 231 - ( x - 6 ) = 103

( x - 6 ) = 231 - 103 

x - 6 = 128

x = 128 + 6

x = 134

a: =>2x+10=4^2=16

=>2x=6

=>x=3

b: =>2x-138=8*9=72

=>2x=138+72=210

=>x=105

c: =>231-(x-6)=103

=>x-6=128

=>x=134

\(a.10+2x=4^5:4^3\\ \Leftrightarrow10+2x=4^2\\ \Leftrightarrow2x=6\\ \Leftrightarrow x=3\)

\(b.2x-138=2^3.3^2\\ \Leftrightarrow2x-138=72\\ \Leftrightarrow x=210:2\\ \Leftrightarrow x=105\)

\(c.231-\left(x-6\right)=1339:13\\ \Leftrightarrow231-\left(x-6\right)=103\\ \Leftrightarrow x-6=128\\ \Leftrightarrow x=134\)

Chú ý : Nếu bạn chưa học \(\Leftrightarrow\)  thì bạn bỏ đi nha !

a) 124 + (118 - x) = 217

118 - x = 217 - 124

118 - x = 93

x = 118 - 93

x = 25

b) 156 - (x + 61) = 82

x + 61 = 156 - 82

x + 61 = 74

x = 74 - 61

x = 13

c) 219 - 7(x + 1) = 100

7(x + 1) = 219 - 100

7(x + 1) = 119

x + 1 = 119 : 7

x + 1 = 17

x = 17 - 1

x = 16

d) (3x - 6).3 = 3⁴

3x - 6 = 3⁴ : 3

3x - 6 = 3³

3x - 6 = 27

3x = 27 + 6

3x = 33

x = 33 : 3

x = 11

e) 231 - (x - 6) = 1339 : 13

231 - (x - 6) = 103

x - 6 = 231 - 103

x - 6 = 128

x = 128 + 6

x = 134

a) 124 + (118 - x) = 217

118 - x = 217 - 124

118 - x = 93

x = 118 - 93

x = 25

b) 156 - (x + 61) = 82

x + 61 = 156 - 82

x + 61 = 74

x = 74 - 61

x = 13

c) 219 - 7(x + 1) = 100

7(x + 1) = 219 - 100

7(x + 1) = 119

x + 1 = 119 : 7

x + 1 = 17

x = 17 - 1

x = 16

d) (3x - 6) . 3 = 3⁴

(3x - 6) . 3 = 81

(3x - 6) = 81 : 3

(3x - 6) = 27

3x = 27 + 6

3x = 33

x = 33 : 3 

x = 11

e) 231 - (x - 6) = 1339 : 13

231 - (x - 6) = 103

(x - 6) = 231 - 103

x - 6 = 128

x = 128 + 6

x = 134

cô cấm dùng máy tính -) 

lớp 9 ms đc dùng:_)

231-(x-6)=1339:13

  231-(x-6)=103

         x-6=231-103

          x-6=128

             x=128+6

             x=134

\(231-\left(x-6\right)=1339:13\)

\(231-\left(x-6\right)=103\)

\(x-6=231-103\)

\(x-6=128\)

\(x=134\)

231 - (x - 6) = 1339 : 13

=> 231 - (x - 6) = 103 

=> x - 6 = 231 - 103 

=> x - 6 = 128

=> x =    128 + 6

=> x =  134 

Vậy x = 134  

#)Giải :

\(231-\left(x-6\right)=1339\div13\)

\(\Leftrightarrow231-\left(x-6\right)=103\)

\(\Leftrightarrow x-6=128\)

\(\Leftrightarrow x=134\)

x là 122 nha bn

k mk nha bn

thanks nhju

231 - ( x - 6 ) = 1339 : 13

231 - ( x - 6 ) = 13

           x - 6   = 231 - 13

           x - 6   = 118

            x        = 118 + 6

            x         = 124

\(231-\left(x-6\right)=1339\div13\)

\(231-\left(x-6\right)=103\)

\(x-6=128\)

\(x=128+6\)

\(x=134\)

Đảm bảo đúng mình học rồi!

231 - ( x - 6 ) = 1339 : 13

231 - x + 6 = 103

231 - x = 103 - 6

231 - x = 97

         x = 231 - 97 

         x = 134

231-(x-6)=1339:13

=>231-(x-6)=103

=>x-6=231-103

=>x-6=128

=>x=128+6

=>x=134

Hk tốt !

\(231-\left(x-6\right)=1339\div9\)

\(\Leftrightarrow231-x+6=103\)

\(\Leftrightarrow237-x=103\)

\(\Leftrightarrow-x=103-237\)

\(-x=-134\)

\(\Leftrightarrow x=134\)

_Minh ngụy_

\(231-\left(x-6\right)=\frac{1339}{13}\)

\(231-\left(x-6\right)=\frac{1339}{13}=103\)

\(=>231-103=x-6\)

\(=>x-6=128\)

\(=>x=128+6=134\)

\(\Leftrightarrow\)231-x+6=103

\(\Leftrightarrow\)231-x=103-6

\(\Leftrightarrow\)x=231-97

\(\Leftrightarrow\)x=134

231-x+6=103

134-x=0

x=134