Tìm x , biết :
a , 390 - ( x - 7 ) = 169 : 13
b , ( x - 140 ) : 7 = 32 - 23 . 3
c , 3x = 33 . 35
d , 2x = 4 . 128
Tìm x, biết:
a, 390 – (x – 7) = 169:13
b, (x – 140) : 7 = 3 3 - 2 3 . 3
c, x – 6 : 2 – (48 – 24) : 2 :6 – 3 = 0
d, x + 5.2 – (32+16.3:6 – 15) = 0
a, x = 384
b, x = 161
c, x = 8
d, x = 15
Tìm x, biết:
a) 390 - ( x - 7 ) = 169 : 13
b) x - 6 : 2 - ( 48 - 24 ) : 2 : 6 - 3 = 0
c) ( x - 140 ) : 7 = 3 3 - 2 3 . 3
d) x + 5 . 2 - ( 32 + 16 . 3 : 6 - 15 ) = 0
Tìm x biết:
a) 390 - ( x - 7 ) = 169 : 13
b) ( x - 140 ) : 7 = 32 - 23 . 3
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
\(390-\left(x-7\right)=169:13\)
\(\Rightarrow390-\left(x-7\right)=13\)
\(\Rightarrow x-7=390-13\)
\(\Rightarrow x-7=377\)
\(\Rightarrow x=384\)
1. Tìm x ∈ N sao cho:
a) (x - 140) : 7 = 33 - 23 . 3
b) x3 . x2 = 28 : 23
c) (x + 2) . (x - 4) = 0
d) 3x-3 - 32 = 2 . 32
2. Tìm x ∈ N sao cho:
a) 9 : (x + 2)
b) (x + 17) : (x + 3)
Giúp mình với, mình cân gấp!
a) (x - 140) : 7 = 33 - 23 . 3
(x - 140) : 7 = 27 - 8 . 3 = 27 - 24 = 3
x - 140 = 3 x 7 = 21
x = 21 + 140 = 161
b) x3 . x2 = 28 : 23
x5 = 25
=> x = 2
c) (x + 2) . ( x - 4) = 0
x = -2 hoặc 4
d) 3x-3 - 32 = 2 . 32 =
3x-3 - 9 = 2 . 9 = 18
3x-3 = 18 + 9 = 27
3x-3 = 33
=> x - 3 = 3
x = 3 + 3 = 6
2.
a) 9 : ( x + 2 )
9 ⋮ 1 ; 9 ⋮ 3 ; 9 ⋮ 9
=> x = -1 ; 1 ; 7
Tìm x biết:
a) 390 - ( x - 7 ) = 169 : 13 b) ( x - 140 ) : 7 = 33 - 23 . 3
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 \(x=35\)
1timf x biết
a/52x-3-2.52 =52.3
b/128-3(x+4)=23
c/[(12X-43).8X=4.84
d/390-(x-7)=169/13
e/(x-6)2=9
g/5x+1=125
h/(x-5)4=(x-5)6
Tìm x ϵ N biết :
a) 280 – ( x – 140 ) : 35 = 270 ;
b)( 190 – 2x ) : 35 – 32 = 16;
c) 720 : [ 41 – ( 2x – 5 ) ] = 23 .5
d) ( x : 23 + 45 ) . 37 – 22 = 24 . 105 ;
e) ( 3x – 4 ) . ( x – 1 ) 3 = 0 ;
f) 22x-1 : 4 = 83
g) x17 = x ;
h) ( x – 5 ) 4 = ( x – 5 ) 6 ;
i) ( x + 2 ) 5 = 210 ;
k ) 1 + 2 + 3 + … + x = 78
l) ( 3 .x – 24) . 73 = 2 .74 ;
n) 5x : 52 = 125 ;
m) ( x + 1) 2 = ( x + 1) 0 ;
o) ( 2 + x ) + ( 4 + x ) + ( 6 + x ) + ……+ ( 52 + x ) = 780 ;
p) 70⋮ x , 80 ⋮ x và x > 8
q) x ⋮ 12 , x ⋮ 25 , x ⋮ 30 và 0 < x < 500
1 Tìm x biết
390 - (x- 7) =169:13
( x - 140) : 7 =33-23.3
x-6:2-(48-24):2:6-3=0
x+5.2-(32+16.3:16-15)=0
nhanh tick
390-(x-7)=169
x-7=221
x=228
mấy bài kia tương tự
Tìm x biết:
a.390-(x-7)=169:13
b.(x-140):7=33--23.3
c.x-6:2-(48-24):2:6-3=0
Mk đang cần rất gấp,ai nhanh mk cho 2 tick luôn nhé.
a.390 - (x - 7) = 169 : 13
390 - (x - 7) = 13
x - 7 = 390 - 13
x = 377 + 7
x = 384
b.(x - 140) : 7 = 33 - 23.3
(x - 140) : 7 = 3
x - 140 = 3 . 7
x = 21 + 140
x = 161
c.x - 6:2 - (48-24):2: 6-3 = 0
x - 3 -2 - 3 = 0
x = 3 + 2 + 3
x = 8
\(a.390-\left(x-7\right)=169:13\)
\(390-\left(x-7\right)=13\)
\(\left(x-7\right)=390-13\)
\(x-7=377\)
\(x=377+7\)
Vậy \(x=384\)
\(b.\left(x-140\right):7=3^3--2^3.3\)
\(\left(x-140\right):7=3^3+2^3.3\)
\(\left(x-140\right):7=27+8.3\)
\(\left(x-140\right):7=27+24\)
\(\left(x-140\right):7=51\)
\(\left(x-140\right)=51.7\)
\(x-140=357\)
\(x=357+140\)
Vậy \(x=497\)
\(c.x-6:2-\left(48-24\right):2:6-3=0\)
\(x-3-24:2:6-3=0\)
\(x-3-12:6-3=0\)
\(x-3-2-3=0\)
\(x-\left(-2\right)=0\)
\(x+2=0\)
\(x=0-2\)
Vậy \(x=-2\)
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