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((8x - 14) : 2 - 2). 31 = 341
(( 8x - 14) : 2 + 2) = 341 : 31
((8x - 14):2 + 2 = 11
((8x - 14) : 2 = 11 - 2
((8x - 14) : 2 = 9
(8x - 14) = 9. 2
8x - 14 = 18
8x = 18 + 14
8x = 32
x = 32 : 8
x = 4
![](https://rs.olm.vn/images/avt/0.png?1311)
[(8x-14):2-2].31=341
(8x-14):2-2=341:31
(8x-14):2-2=11
(8x-14):2=11+2
(8x-14):2=13
(8x-14)=13.2
(8x-14)=26
8x=26+14
8x=40
x=40:8
x=5
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\left[(8x-14):2-2\right].31=341\)
\(\left(8x-14\right):2-2=11\)
\(\left(8x-14\right):2=13\)
\(8x-14=26\)
\(8x=40\)
\(x=5\)
vậy \(x=5\)
![](https://rs.olm.vn/images/avt/0.png?1311)
Ta có: (- 16) + | -14| = (-16) + 14 = -(16 – 14) = -2
Chọn (D) -2.
![](https://rs.olm.vn/images/avt/0.png?1311)
2(3x +2) -15=4x+9
6x+12-4x=9+15
6x - 4x=24-12
(6-4)x=12
2x=12
x=6
Vậy x=6
bik thế thoi ak
![](https://rs.olm.vn/images/avt/0.png?1311)
a) (4600 + 6400) -7.x=3839
11000 - 7.x=3839
7.x=11000-3839
7.x=7161
x=7161:7
x=1023
b) (8x-14) :2-2= 341:31
(8x-14):2-2=11
(8x-14):2= 11+2
(8x-14):2=13
8x-14=13.2
8x-14=26
8x=26+14
8x=40
x=40:8
x=5
![](https://rs.olm.vn/images/avt/0.png?1311)
a)(4600 + 6400) - 7.x = 3839
11000-7x=3839
7x=7161
x=1023
Vậy x=1023
b)[(8x - 14 ) : 2 - 2 ]. 31 = 341
(8x - 14 ) : 2 - 2=11
(8x - 14 ) : 2=13
8x - 14 =26
8x=40
x=5
Vậy x=5
c)2.(x - 3) - x = 4.2^3
2.(x - 3) - x=32
2x-6-x=32
x-6=32
x=38
Vậy x=38
Bài 1 : Tìm x
a, ( 4600 + 6400 ) - 7.x = 3839
11000 - 7.x = 3839
7.x = 11000 - 3839
7.x = 7161
x = 7161: 7
x = 1023
b, [ ( 8x - 14 ) : 2 - 2 ] . 31 = 341
( 8x -14 ) : 2 -2 = 11
( 8x -14 ) : 2 = 13
8x -14 = 26
8x = 40
x = 5
c, 2. ( x -3 ) - x = 4. 23
2x - 6 - x = 32
x - 6 = 32
x = 38
[(8x-14):2-2]=341:31
[(8x-14):2-2]=11
[(8x-14):2=11+2
[(8x-14):2=13
(8x-14)=13.2
8x-14=26
8x=26+14
8x=40
x=40:8
x=5
Dễ thì làm đi tui làm chưa chắc chắn