(6. x - 39).28 = 5628
(9. x + 2). 3 =60
X-6-(48-24×2÷6-3)=100
20-[7×(X-3)+4]=2
[(6×X-39)÷3].28=5628
x-6-(48-24x2:6-3)=100
x-6-(48-8-3)=100
x-6-37=100
x-6=137
x=137+6=143
Vậy x=143
20-[7x(X-3)+4]=2
7x(X-3)+4=20-2
7x(X-3)+4=18
7x(X-3)=14
X-3=14:7
X-3=7
X=7+3=10
Vậy X=10
[(6.X-39):3].28=5628
(6.X-39):3=5628:28
(6.X-39):3=201
6.X-39=201.3=603
6.X=603+39
6.X=642
X=642:6=107
Vậy x=107
1) \(x-6-\left(48-24.2:6-3\right)=100\Rightarrow x-6-\left(48-8-3\right)=100\)
\(\Rightarrow x-6-37=100\Rightarrow x=100+37+6=143\)
2) \(20-\left[7\left(x-3\right)+4\right]=2\Rightarrow7\left(x-3\right)+4=20-2=18\)
\(\Rightarrow7\left(x-3\right)=18-4=14\Rightarrow x-3=14:7=2\Rightarrow x=2+3=5\)
3) \(\left[\left(6x-39\right):3\right].28=5628\Rightarrow\left(6x-39\right):3=5628:28=201\)
\(\Rightarrow6x-39=201.3=603\Rightarrow6x=603+39=642\Rightarrow x=642:6=107\)
Tìm x,biết:
[(6*x-39):3]*28=5628
[(6*x-39):3]*28=5628
(6*x-39):3=5628:28
(6*x-39):3=201
6*x-39=201*3
6*x-39=603
6*x=603+39
6*x=642
x=642:6
x=107
[(6*x - 39): 3] * 28 = 5628
[(6*x - 39): 3] = 5628 : 28
[(6*x - 39): 3] = 201
( 6*x - 39) = 201 x 3
6*x - 39 = 603
6*x = 603 + 39
6*x = 642
x = 642 : 6
x = 107
[ ( 6 nhân X - 39 ) : 3 ] nhân 28 = 5628
tim x
36: [ 7 x (X-3) + 4 ] =2^4 : 2^3
[(6 X - 39 ) :3 ] x 28 = 5628
720x [41 - (2 X - 5 =2^3 x 5
a, [(6.x - 39) :3] .28 =5628
B, 5.(7.x- 45) = 23 . 52 - 32.20
Giúp tớ nhanh vs aj
`#3107.101107`
a,
\([(6.x - 39) \div3] .28 =5628\)
`\Rightarrow (6x - 39) \div 3 = 5628 \div 28`
`\Rightarrow (6x - 39) \div 3 = 201`
`\Rightarrow 6x - 39 = 201 . 3`
`\Rightarrow 6x - 39 = 603`
`\Rightarrow 6x = 42`
`\Rightarrow x = 42 \div 6`
`\Rightarrow x = 7`
Vậy, `x = 7`
b,
`5(7x - 45) = 2^3 . 5^2 - 3^2 . 20`
`\Rightarrow 5(7x - 45) = 8.5.5 - 9.4.5`
`\Rightarrow 5(7x - 45) = 5.(8.5 - 9.4)`
`\Rightarrow 5(7x - 45) = 5.(40 - 36)`
`\Rightarrow 7x - 45 = 5.(40 - 36) \div 5`
`\Rightarrow 7x - 45 = 4`
`\Rightarrow 7x = 49`
`\Rightarrow x = 7`
Vậy, `x = 7.`
1: 9 - 25 - (7 - x) - (25 + 7)
2: -6 . x = 18
3: [(6 . x - 72) : 2- 84]. 28= 5628
1: 9 - 25 - (7 - x) - (25 + 7)
đề thiếu
2: -6 . x = 18
x=18:(-6)
x=-3
3: [(6 . x - 72) : 2- 84]. 28= 5628
(6.x-72):2-84=5628:28
(6.x-72):2-84=201
(6.x-72):2=201+84
(6.x-72):2=285
6.x-72=285.2
6.x-72=570
6.x=570+72
6.x=642
x=642:6
x=107
Tìm x:
A,219-7(x+1)=100
B,(3x-6).3=3^4
C,3^x.3^2=243
d,20-[7(x-3)+4]=2
E,[(6x-39):3].28=5628
F,x^50=x
G,(3.x-2^4).7^3=2.7^4
H,(x-9)^2-4=21
a) 219-7x-7=100
212-7x=100
7x=112
x=16
các câu còn lại cứ thế mà làm
a/x=2^8:2^4+3^2.3^3
b/6x-39=5628:28
a) x = 2^8 : 2^4 + 3^2 . 3^3
x = 2^4 + 3^5
x = 16 + 243
x = 259
b) 6x - 39 = 5628 : 28
6x - 39 = 201
6x = 240
x = 40
câu 1 20 chia hết cho x
câu 2 2x +9=2019
câu 3 6x-39=5628:28
câu 4 2x+1+54=86
Câu 1: \(20⋮x\)=> \(x\inƯ\left(20\right)=\left\{\pm1;\pm2;\pm4;\pm5;\pm10;\pm20\right\}\)
Câu 2: 2x + 9 = 2019
2x = 2019 - 9
2x = 2010
x = 2010 : 2
x = 1005
Câu 3: 6x - 39 = 5628 : 28
6x - 39 = 201
6x = 201 +39
6x = 240
x = 240 : 6
x = 40
Câu 4: 2x+1 + 54 = 86
2x+1 = 86 - 54 = 32
2x+1 = 25
=>x+1 = 5
=>x=4