390 - (x-7 ) - 169 : 13 = 0

 390 - (x-7 ) -  13 = 0

390 - (x-7) = 13 +0 

390 -(x-7 ) = 13

x-7 = 390 -13 

x-7 = 377

x= 377 +7 

x= 384

390-(x-7)-169:13=0

390-(x-7)-13=0

390-(x-7)=0+13

390-(x-7)=13

x-7=390-13

x-7=377

x=377+7

x=384

vậy x=384                                                                                                                                                                                  

390-(x-7)-13=0

390-(x-7)=0+13

390-(x-7)=13

x-7=390-13

x-7=377

x=377+7

x=384

390 - ( x - 7 ) = 169 : 13

390 - ( x - 7 ) = 13

x - 7 = 390 - 13

x - 7 = 377

x = 377 + 7

x = 384

\(390-\left(x-7\right)=169:13\)

\(390-\left(x-7\right)=13\)

\(x-7=390-13\)

\(x-7=377\)

\(x=377+7\)

\(x=384\)

k nha

a)390-(x-7)=169:13

<=>390-(x-7)=13

<=>x-7=390-13

<=>x-7=377

<=>x=377+7

<=>x=384

b)x-6:2-(48-24):2:6-3=0

<=>x-3-24:2:6-3=0

<=>x-6-12:6=0

<=>x-6-2=0

<=>x-8=0

<=>x=8

a) 390 - ( x - 7 ) = 169 : 13

390 - ( x - 7 ) = 13

x - 7 = 390 - 13

x - 7 = 377

     x = 377 + 7

     x = 384

b) x - 6 : 2 - ( 48 - 24  ) : 2 : 6 - 3 = 0

x - 3 - ( 48 - 24 ) : 2 : 6 = 0 + 3 = 3

x - 3 - ( 48 - 24 ) : 2 = 3 x 6 = 18

x - 3 - ( 48 - 24 ) = 18 x 2

x - 3 - 24 = 36

x - 3 = 36 + 24

x - 3 = 60

    x = 60 + 3 

    x = 63

Jang Ha Na làm sai mà cũng đc ****

a) 390 - (x - 7) = 169 : 13

390 - (x - 7) = 13

x - 7 = 390 - 13

x - 7 = 377

x = 377 + 7

x = 384

b) ( x - 140 ) : 7 = 3² - 2³ . 3

(x - 140) : 7 = -15

x - 140 = -15 . 7

x - 140 = -105

x = 105 + 140

x = 35

a) 390 - (x - 7) = 169 : 13

    390 - (x - 7) = 13

    x - 7 = 390 - 13 = 377

    x = 377 + 7

    x = 384

\(390-\left(x-7\right)=169:13\)

\(\Rightarrow390-\left(x-7\right)=13\)

\(\Rightarrow x-7=390-13\)

\(\Rightarrow x-7=377\)

\(\Rightarrow x=384\)

a, x = 384

b, x = 161

c, x = 8

d, x = 15

X

a)

\(390-x+7=13\)

\(\Rightarrow397-x=13\)

\(\Rightarrow x=384\)

b)

\(\left(140-x\right):7=27-24\)

\(140-x=21\)

x=119

a) \(390-\left(x-7\right)=169:13\)

\(390-\left(x-7\right)=13\)

\(x-7=390-13\)

\(x-7=377\)

\(x=377+7\)

\(x=384\)

Vậy \(x=384\)

b) \(\left(x-140\right):7=3^2-2^3\cdot3\)

\(\left(x-140\right):7=-15\)

\(x-140=\left(-15\right)\cdot7\)

\(x-140=-105\)

\(x=\left(-105\right)+140\)

\(x=35\)

Vậy \(x=35\)

\(390-\left(x-7\right)=169:3\)

\(\Rightarrow390-\left(x-7\right)=\dfrac{169}{3}\)

\(\Rightarrow x-7=390-\dfrac{169}{3}\)

\(\Rightarrow x-7=\dfrac{1001}{3}\)

\(\Rightarrow x=\dfrac{1001}{3}+7\)

\(\Rightarrow x=\dfrac{1022}{3}\)

390-(X-7)=169:3

390 - (X-7)= 169/3

X - 7 = 390 - 169/3

X - 7 = 1001/3

X= 1001/3 + 7

X= 1022/3