390-(x-7)=169:13
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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 ) = 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
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
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-(x-7)=169:13
390-(x-7)=13
(x-7)=390-13
(x-7)=377
x=377+7
x=384