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a) x+(-35)=18
x-35=18
x=18+35
x=53
vậy x=53
b) -2x-(-17)=15
-2x+17=15
-2x=15-17
-2x=-2
x=-2:(-2)
x=1
vậy x=1
![](https://rs.olm.vn/images/avt/0.png?1311)
a, - ( x + 84 ) + 213 = -16
=> - ( x + 84 ) = -16 - 213
=> - ( x + 84 ) =-229
=> x + 84 = 229
=> x = 145
b. x + ( -35 ) = 18
=> x = 18 - ( -35 )
=> x = 18 + 35
=> x = 53
c. -2x - ( - 17 ) = 15
=> -2x = 15 + ( -17)
=> -2x = -2
=> x = 1
\(a,-\left(x+84\right)+213=-16\)
\(x+84=213+16\)
\(x+84=229\)
\(x=229-84\)
\(x=145\)
\(b,x+\left(-35\right)=18\)
\(x=18+35\)
\(x=53\)
\(c,-2x-\left(-17\right)=15\)
\(-2x+17=15\)
\(2x=17-15\)
\(2x=2\)
\(x=1\)
![](https://rs.olm.vn/images/avt/0.png?1311)
Tìm số nguyên x, biết:
1) -16 + 23 + x = - 16
7+x=-16
x=-16-7
x=-23
2) 2x – 35 = 15
2x=15+35
2x=50
x=50:2
x=25
3) 3x + 17 = 12
3x=12-17
3x=-5
x=-5/3
4) (2x – 5) + 17 = 6
2x-5=6-17
2x-5=-11
2x=-11+5
2x=-6
x=-6:2
x=-3
5) 10 – 2(4 – 3x) = -4
2(4-3x)=10-(-4)
2(4-3x)=14
4-3x=14:2
4-3x=7
3x=4-7
3x=-3
x=-3:3
x=-1
6) - 12 + 3(-x + 7) = -18
3(-x+7)=-18-(-12)
3(x+7)=-6
x+7=-6:3
x+7=-2
x=-2-7
x=-9
![](https://rs.olm.vn/images/avt/0.png?1311)
a) 416 + ( x-45 )= 387
416-45+x=387
x=387-(416-45)
x=16
b) 11-(x+84)=97
11-x-84=97
-x=84-11+97
-x=170
x=-170
c) -(x+84)+213=-16
-x-84+213=-16
-x=-16-213+84
-x=-145
x=145
d)x+(-35)=18
x-35=18
x=53
e) -2x-(-17)=15
-2x+17=15
-2x=-2
x=1
P/s tham khảo nha
A) 416 + (X-45) =387
416+X-45= 387
416-45+X=387
371+X=387
X=387-371
X=16
B) 11-(X+84)=97
11-X-84=97
11-84-X=97
-73-X=97
X=-73-97
X=-170
C) -(X+84) +213=-16
-X-(84-213) =-16
-X-(-129)=-16
-X=(-16)+(-129)
-X= -145
X=145
D) X+(-35)=18
X=18-(-35)
X=53
E) -2X-(-17) =15
-2X+17=15
-2X=15-17
-2X=-2
X=-2:-2
X=1
![](https://rs.olm.vn/images/avt/0.png?1311)
x+(-35)=18
x = 18 - ( - 35 )
x = 53
2x - ( - 17 ) = 15
2x + 17 = 15
2x = 15 - 17
2x = -2
x = -2 : 2
x = -1
x+(-35)=18
x = 18 - (-35)
x = 53
vậy___
2x- (-17) = 15
2x = 15 + (-17)
2x = 32
x = 32 : 2
x = 16
vậy____
![](https://rs.olm.vn/images/avt/0.png?1311)
a, (2\(x\) -5) + 17 = 6
2\(x\) - 5 = 6 - 17
2\(x\) - 5 = - 11
2\(x\) = - 11 + 5
2\(x\) = -6
\(x\) = -3
b, (-18).\(x\) = - 36
\(x\) = -36 : (-18)
\(x\) = 2
c, 15 - (-11\(x\) - 7) = -22
- 11\(x\) - 7 = 15 + 22
-11\(x\) - 7 = 37
11\(x\) = -37 - 7
11\(x\) = - 44
\(x\) = - 4
a) \(\left(2x-5\right)+17=6\Rightarrow2x-5=-11\Rightarrow2x=-6\Rightarrow x=-3\)
b) \(\left(-18\right)x=-36\Rightarrow x=\left(-36\right):\left(-18\right)=2\)
c) \(15-\left(-11x-7\right)=-22\)
\(\Rightarrow15+11x+7=-22\)
\(\Rightarrow11x=-22-7-15\)
\(\Rightarrow11x=-44\)
\(\Rightarrow x=-44:11=-4\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a, 2x -35=15
2x =15+35
2x =50
x =50:2
x =25 vậy x =25
b,3x +17=2
3x =2-17
3x =-15
x =-15:3
x =-5 vậy x=-5
A} 2x-35=15
2x=15+35
2x=50
x=50x1:2
x=25
B]-3x=2+17
-3x=19
x=19-1:3
x=6
![](https://rs.olm.vn/images/avt/0.png?1311)
a) 2x-35=15
2x=15+35
2x=50
x=50:2
x=25
b) 3x+17=2
3x=2-17
3x=-15
x=-15:3
x=-5
c) /x-1/=0
x-1=0
x=0+1
x=1
X + (- 35 ) = 18
X - 35 = 18
X = 18 + 35
X = 53
Vậy X = 53
- 2x -(- 17)= 15
- 2x + 17 = 15
- 2x = 15 - 17
- 2x = - 2
x = - 2 : ( - 2 )
x = 1
Vậy x = 1
1) x+ (-35)=18
<=> x-35=18
<=> x=53
2) -2x-(-17)=15
<=> -2x+17=15
<=> -2x=-2
<=> x=1