n: (-8)*x+17=-23

=>\(x\cdot\left(-8\right)=-23-17=-40\)

=>\(x\cdot8=40\)

=>\(x=\dfrac{40}{8}=5\)

o: \(\left(-15\right)\cdot x=10\left(-4\right)-5\)

=>\(x\cdot\left(-15\right)=-40-5=-45\)

=>\(x\cdot15=45\)

=>\(x=\dfrac{45}{15}=3\)

p: \(\left(-3\right)\cdot x-4=2\cdot\left(-7\right)+4\)

=>\(\left(-3\right)\cdot x-4=-14+4=-10\)

=>\(x\left(-3\right)=-10+4=-6\)

=>\(3x=6\)

=>\(x=\dfrac{6}{3}=2\)

q: x+x+x+91=-2

=>\(3x+91=-2\)

=>\(3x=-2-91=-93\)

=>\(x=-\dfrac{93}{3}=-31\)

r: \(-152-\left(3x+1\right)=\left(-2\right)\cdot\left(-27\right)\)

=>\(-152-3x-1=54\)

=>\(-153-3x=54\)

=>\(3x=-153-54=-207\)

=>\(x=-\dfrac{207}{3}=-69\)

x + x + x + 91 = -2

x + x + x = -2 - 91

x + x + x = -93

3x = -93

x = -93 : 3

x = -31

-152 - (3x + 1) = (-2) . (-27)

-152 - (3x + 1) = 54

3x + 1 = -152 - 54

3x + 1 = -206

3x = -206 - 1

3x = -207

x = -207 : 3

x = -69

|5x + 1| = 11

5x + 1 = 11 hay 5x + 1 = -11

5x = 11 - 1 hay 5x = -11 - 1

5x = 10 hay 5x = -12

x = 10 : 5 hay x = -12 : 5

x = 2 hay x = -2,4

Mà x ∈ Z

x = 2

thank bn nha

a) 5(-x - 2) = 0

-x - 2 = 0

-x = 0 + 2

-x = 2

x = -2 (nhận)

Vậy x = -2

b) (-4).x = 26

x = 26 : (-4)

x = -13/2 (loại)

Vậy không tìm được x là số nguyên thỏa mãn đề bài

c) -152 - (3x + 1) = (-2).27

-152 - (3x + 1) = -54

3x + 1 = -152 + 54

3x + 1 = -98

3x = -98 - 1

3x = -99

x = -99 : 3

x = -33 (nhận)

Vậy x = -33

a, 5.(- \(x\) - 2) = 0

       - \(x\) - 2    = 0

         \(x\)         = - 2

b, (-4).\(x\)       = 26

           \(x\)       = 26 : (-4)

          \(x\)      = - \(\dfrac{13}{2}\) (loại) vì \(x\)\(\in\) Z)

c; -152 - (\(3x\) + 1) = (-2).(27)

     -152 - 3\(x\) - 1   = - 54

               3\(x\)        = -54 + 1 + 152

              3\(x\)         = - 99

               \(x\)          = - 99: 3

                \(x\)         = - 33

a) x - 8 - (12 - 2x) = -20

=> x - 8 - 12 + 2x = -20

=> (x + 2x) + (-8 - 12) = -20

=> 3x - 20 = -20

=> 3x = 0 => x = 0

b) -27 + (x + 8) - ( +11) = 2

=> -27 + x + 8 - 11 = 2

=> -27 + x = 2 + 11 - 8

=> -27 + x = 5

=> x = 5 - (-27) = 32

c) -2x - 16 = -2 - (3x + 9)

=> -2x - 16 = -2 - 3x - 9

=> -2x - 16 + 2 + 3x + 9 = 0

=> (-2x + 3x) + (-16 + 2 + 9) = 0

=> x - 5 = 0

=> x = 5

\(a,x-8-\left(12-2x\right)=-20\)

\(x-8-12+2x=-20\)

\(x+2x-8-12=-20\)

\(3x-20=-20\)

\(3x=-20+20\)

\(3x=0\)

\(x=0\)

\(b,-27+\left(x+8\right)-\left(+11\right)=2\)

\(-27+x+8-11=2\)

\(x-27+8-11=2\)

\(x-30=2\)

\(x=2+30\)

\(x=32\)

\(c,-2x-16=2-\left(3x+9\right)\)

\(-2x-16=2-3x-9\)

\(-2x+3x=2-9+16\)

\(x=9\)

Học tốt

a) x - 8 - ( 12 - 2x ) = -20

x - 8 - 12 + 2x = -20

x + 2x = -20 + 8 + 12

3x = 0

x = 0 \(\left(x\in Z,tm\right)\)

Vậy x=0

b) -27 + ( x + 8 ) - ( +11 ) = 2

-27 + x + 8 - 11 = 2

x = 2 + 27 - 8 + 11

x = 32 \(\left(x\in Z,tm\right)\) 

Vậy x = 32

c) -2x - 16 = 2 - ( 3x + 9 )

-2x - 16 = 2 - 3x - 9

-2x + 3x = 2 - 9 +16

x = 9 \(\left(x\in Z,tm\right)\)

Vậy x = 9

\(a,-152-\left(3x+1\right)=\left(-2\right).\left(-77\right)\)

\(-152-\left(3x+1\right)=154\)

\(3x+1=-152-154\)

\(3x=306\)

\(x=-102\)

Vậy \(x=-102\)

\(b,234+\left(-334-x\right)=500\)

\(-334-x=266\)

\(x=-600\)

Vậy \(x=-600\)

\(c,\left(567-x\right)+121=-641\)

\(567-x=-762\)

\(x=1329\)

Vậy \(x=1329\)

Làm lại câu a :

a, -152-(3x+1)=(-2).(-77)

-152-(3x+1)=154

3x+1=-306

3x=-307

x=-307/3

Vậy x=-307/3

a,-152-(3x+1)=(-2).(-77)

   -152-(3x+1)=154

     3x+1=-152-154

     3x+1=-306

     3x=-307

     x=-307/3

b,234+(-334-x)=500

   -334-x=500-234

   -334-x=266

    x=-334-266

    x=-600

c,(567-x)+121=-641

    567-x=-641-121

    567-x=-762

    x=567-(-762)

    x=1329

a) 3x + 27 = 9

=> 3x = 9 - 27

=> 3x = -18

=> x = -18 : 3

=> x = -6

b) 2x + 12 = 3(x - 7)

=> 2x + 12 = 3x - 3 . 7

=> 2x + 12 = 3x - 21

=> 3x - 2x = 21 - 12

=> x = 9

c) 2x . 2 - 1 = 49

=> 2x . 2 = 49 + 1

=> 2x . 2 = 50

=> 2x = 50 : 2

=> 2x = 25

=> x =25 : 2

=> x = 25/2

d) |-9 - x| - 5 = 12

=> |-9 - x| = 12 + 5

=> |-9 - x| = 17

=> \(\orbr{\begin{cases}-9-x=17\\-9-x=-17\end{cases}}\)

=> \(\orbr{\begin{cases}x=-9-17\\x=-9-\left(-17\right)\end{cases}}\)

=> \(\orbr{\begin{cases}x=-26\\x=8\end{cases}}\)

3x + 27 = 9

        3x = 9 - 27

         3x = - 18

           x = - 6

b, 2x + 12 = 3.( x - 7 )

    2x + 12 = 3x - 21

     2x - 3x = - 21 - 12

            - x = - 33

              x = 33

c, 2x² - 1 = 49

=> 2x² = 49 + 1

=> 2x² = 50

=> x² = 50 : 2

=> x² = 25

=> x = 5 hoặc x = - 5

d, | - 9 - x | - 5 = 12

         | - 9 - x | = 12 + 5 

         | - 9 - x | = 17

=> - 9 - x = 17 hoặc - 9  - x = - 17

=> x = - 26 hoặc x = 8

S=1-2+3-4+...+99-100

a) \(-x-14+32=-26\)

\(-x=-26-32+14\)

\(-x=-44\)

\(x=44\)

b) \(-152-\left(3x+1\right)=\left(-2\right)\left(-27\right)\)

\(-152-3x-1=54\)

\(-3x=96\)

\(x=-32\)

c) \(x+x+x+82=-2-x\)

\(3x+82=2+x\)

\(2x=-80\)

\(x=-40\)

d) \(\left(-1\right)\left(-3\right)\left(-6\right)x=36\)

\(-18x=36\)

\(x=-2\)

1)

\(-x-14+32=-26\)

\(\Rightarrow-x+18=-26\)

\(\Rightarrow-x=-26-18\)

\(\Rightarrow-x=-44\)

\(\Rightarrow x=44\)

Vậy \(x=44\)

2)

\(-152-\left(3x+1\right)=\left(-2\right)\left(-27\right)\)

\(\Rightarrow-152-3x-1=54\)

\(\Rightarrow-153-3x=54\)

\(\Rightarrow-3x=54+163\)

\(\Rightarrow-3x=207\)

\(\Rightarrow x=207:\left(-3\right)\)

\(\Rightarrow x=-69\)

Vậy \(x=-69\)

3)

\(x+x+x+82=-2-x\)

\(\Rightarrow3x+82=-2-x\)

\(\Rightarrow3x+x=-2-82\)

\(\Rightarrow4x=-84\)

\(\Rightarrow x=-21\)

Vậy \(x=-21\)

4)

\(\left(-1\right)\left(-3\right)\left(-6\right).x=36\)

\(\Rightarrow-18x=36\)

\(\Rightarrow x=-2\)

Vậy \(x=-2\)