![](https://rs.olm.vn/images/avt/0.png?1311)
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
Bài 1:
a.
$-12-(-46)=-12+46=46-12=34$
b.
$-(-8)-54=8-54=-(54-8)=-46$
c.
$-15-(-72)=-15+72=72-15=57$
Bài 2:
a. $(156-812)-(156-12)=156-812-156+12$
$=(156-156)-(812-12)=0-800=-800$
b.
$-(-72+83)-(72+17)=72-83-72-17=(72-72)-(83+17)$
$=0-100=-100$
c.
$-(-23-78)+(77-178)=23+78+77-178$
$=(23+77)-(178-78)=100-100=0$
d.
$(-213-156)-(-213+44)=-213-156+213-44=(-213+213)-(156+44)$
$=0-200=-200$
![](https://rs.olm.vn/images/avt/0.png?1311)
1) (-6 - 2) . (-6 + 2) = -8 . (-4) = 32
2) 627 + 125 + (-627) + |-46| -21 = 125 + 46 - 21 = 150
3) (-25) + 30 + (-16) + 25 + (-4) = 30 + (-20) = 10
4) 75 - 5.(15 - 40) - (-60) = 75 - 75 + 80 + 60 = 140
5) |31 - 17| - |15 - 52| = |14| - |-37| = 14 - 37 = -23
6) 13 - 18 - (-42) - 15 = 13 - 18 + 42 - 15 = 22
3 bài sau hết kiên nhẫn rồi, thông cảm nhé.
![](https://rs.olm.vn/images/avt/0.png?1311)
213-3.(8-x)=72
210.(8-x)=72
8-x=210-72
8-x=138
x= 8 - 138
x= -130
xg rồi đó bạn
![](https://rs.olm.vn/images/avt/0.png?1311)
a) ( 2017 - x ) : 3 = 345
<=> 2017 - x = 1035
<=> x = 2017 - 1035
<=> x = 982
b) 317 - ( 213 - x ) = 137
<=> 213 - x = 317 - 137
<=> 213 - x = 180
<=> x = 213 - 180
<=> x = 33
c) [ (2x + 51 ) - 97 ] . 3 = 72
<=> (2x + 51) - 97 = 24
<=> 2x + 51 = 121
<=> 2x = 70
<=> x = 35
d) x + 345 : 15 = 65
<=> x + 23 = 65
<=> x = 42
e) 12x + 24 =744
<=> 12x = 720
<=> x = 60
g) 12 (x + 24) = 744
<=> x + 24 = 62
<=> x = 38
![](https://rs.olm.vn/images/avt/0.png?1311)
tính : 3/17 . 6/29 - 3/17 . 35/29 + 2022 3/17
b, 5/6-(1/3+1/2). 20%
c,9.5+(-13,2)+12,5+(-0,8)
![](https://rs.olm.vn/images/avt/0.png?1311)
a: \(\dfrac{1}{8}< \dfrac{x}{40}< \dfrac{1}{5}\)
=>\(\dfrac{5}{40}< \dfrac{x}{40}< \dfrac{8}{40}\)
=>5<x<8
mà x nguyên
nên \(x\in\left\{6;7\right\}\)
b: \(\dfrac{-1}{8}< \dfrac{x}{72}< \dfrac{-1}{36}\)
=>\(\dfrac{-9}{72}< \dfrac{x}{72}< \dfrac{-2}{72}\)
=>-9<x<-2
mà x nguyên
nên \(x\in\left\{-8;-7;-6;-5;-4;-3\right\}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
213 + (X - 25) = -187
=> x - 25 = -187 - 213
=> x = -187 - 213 + 25
=> x = -375
2.(x - 2) + 17 = -13
=> 2.(x - 2) = -13 - 17
=> 2.(X - 2) = -30
=> x - 2 = -30:2
=> x - 2 = -15
=> x = -15 + 2
=> x = -13
x - 8 - 13 = -8
=> x - 21 = -8
=> x = -8 + 21
=> x = 13
x + 11 + 14 = 15
=> x + 25 = 15
=> x = 15 - 25
=> x = -10
a) x- 25= -187 - 213 = -400
x= -400:25 = -16
b) 2.(x-2) = -13- 17 = -30
x- 2 = -30 :2 = -15
x= -15+2 = -13
c) x-8 = -8+13 = 5
x= 5+8 = 13
d) x+11 = 15-14 = 1
x= 1-11 = -10
![](https://rs.olm.vn/images/avt/0.png?1311)
a,461+(x-45)=387
=>x-45=387-461
=>x-45=-74
=>x=-74+45
x=-29
3 . ( 8 - x ) = 213 - 72
3 . ( 8 - x ) = 141
8 - x = 141 : 3
8 - x = 47
x = 8 - 47
x = -39
213 - 3.(8 - x) = 72
3.(8 - x) = 213 - 72
3.(8 - x) = 141
8 - x = 141 : 3
8 - x = 47
x = 8 - 47
x = -39