tìm x bt :
[(8x-14):2-2].31=341
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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
[(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
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
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
\(\left[\left(8x-14\right):2-2\right]\cdot31=341\)
\(\left(8x-14\right):2-2=11\)
\(\left(8x-14\right):2=13\)
\(8x-14=26\)
\(8x=40\)
\(x=5\)
[ (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
K MK NHA BẠN
CẢM ƠN NHÌU NHA !
\(\left[(8x-14):2-2\right].31=341\)
\(\left(8x-14\right):2-2=11\)
\(\left(8x-14\right):2=13\)
\(8x-14=26\)
\(8x=40\)
\(x=5\)
vậy \(x=5\)
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].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
4x+3=256
=> 4x+3=44
=> x+3=4
=> x=4-3
=> x=1
6+3x+2=87
=> 3x+2=87-6
=> 3x+2=81
=> 3x+2=34
=> x+2=4
=> x=4-2
=> x=2
1300:[120-(x-9)]=25
=> 120-(x-9)=1300:25
=> 120-(x-9)=52
=> x-9=120-52
=> x-9=68
=> x=68+9
=> x=77
[(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
dễ ẹt tik di lm cho that do