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

tự đi mà làm

a,x=-2,-2,0,1

b, x-18=16x3

x-18=48 suy ra x = 66

c, 3x(x+4)=128-23

3x(x+4)=105

x(x+4)=105:3=35

x.x=x.4

x^2=4

x=2

a,=>x=(-2)-1;0;1

b,x-18=16.3

  x-18=48

       x=48+18

       x=66

c,3(x+4)=128-23

   3(x+4)=105

       x+4= 105:3

       x+4=35

           x=35-4

           x=31

a) x = 0

b) x= 0

c) x = -16

d) x = 15

e) x : 2 +1 = 8 hoặc x:2+1 = -8 . Do đó x = 14 hoặc x = -18.

f) x: 2 = 11 hoặc x : 2 = -11 . Do đó x = 22 hoặc x = -2

bài2 \(x\times\dfrac{15}{16}-x\times\dfrac{4}{16}=2\) 

     \(x\times\dfrac{11}{16}=2\) 

     \(x=2:\dfrac{11}{16}\) 

    \(x=\dfrac{32}{11}\)

Bài 1 : 

 \(\dfrac{x}{16}\times\left(2017-1\right)=2\)

          \(\dfrac{x}{16}\times2016=2\)

                      \(\dfrac{x}{16}=\dfrac{2}{2016}\)

                         \(x=\dfrac{2}{2016}\times16\)

                         \(x=\dfrac{1}{63}\)

1- (5\(\dfrac{4}{9}\) +x+7\(\dfrac{7}{18}\)) : 15\(\dfrac{3}{4}\) = 0 

1- (\(\dfrac{49}{9}+x+\dfrac{133}{18}\)) : \(\dfrac{63}{4}=0\) 

 (\(\dfrac{49}{9}+\dfrac{133}{18}\)+\(x\) ) : \(\dfrac{63}{4}\) = 1 - 0 

       (\(\dfrac{77}{6}\) + \(x\) ) : \(\dfrac{63}{4}\) = 1

         \(\dfrac{77}{6}+x\)         = 1 x \(\dfrac{63}{4}\) 

          \(\dfrac{77}{6}\) + \(x\)          = \(\dfrac{63}{4}\)

                  \(x\)            = \(\dfrac{63}{4}\) - \(\dfrac{77}{6}\)

                  \(x=\) \(\dfrac{35}{12}\)

a) {-2).x = -10 => x = (-10): (- 2) => x = 5.

b)  (-18). x = -36 => x = (-36): (-18) => x = 2.

c) 2.x + 1 = 3=>2x = 2 => x = l.

d) (-4).x + 5 = -15 => (-4)x = (-15) -5 => (-4) x = -20 => x = 5.

a) {-2).x = -10 => x = (-10): (- 2) => x = 5.

b)  (-18). x = -36 => x = (-36): (-18) => x = 2.

c) 2.x + 1 = 3=>2x = 2 => x = l.

d) (-4).x + 5 = -15 => (-4)x = (-15) -5 => (-4) x = -20 => x = 5.

a)

− 12 . x = − 15 . − 4 − 12 − 12 . x = 60 − 12 − 12 . x = 48                x = 48 : − 12                x = − 4

b) 

− 9 . x + 3 = − 2 . − 7 + 16 − 9 . x + 3 = 14 + 16 − 9 . x + 3 = 30 − 9 . x           = 30 − 3 − 9 . x           = 27              x           = 27 : − 9              x           = − 3

c)

− 12 . x − 34 = 2 − 12 . x               = 2 + 34 − 12 . x               = 36                x                = 36 : − 12                x                = − 3

a)

− 12 . x = − 15 . − 4 − 12 − 12 . x = 60 − 12 − 12 . x = 48                x = 48 : − 12                x = − 4

b)

− 9 . x + 3 = − 2 . − 7 + 16 − 9 . x + 3 = 14 + 16 − 9 . x + 3 = 30 − 9 . x           = 30 − 3 − 9 . x           = 27              x           = 27 : − 9              x           = − 3

c) 

− 12 . x − 34 = 2 − 12 . x               = 2 + 34 − 12 . x               = 36                x                = 36 : − 12                x                = − 3