x + 2x = -36

      3x = -36

       x = -36 : 3

       x = -12

Vậy x = -12

x=  -12 nha 

x*(1+2)=-36

x*3=-36

x=-36/3

x=-12

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) \(15-\left(-11x-7\right)=-22\)

\(\Rightarrow15+11x+7=-22\)

\(\Rightarrow11x=-22-7-15\)

\(\Rightarrow11x=-44\)

\(\Rightarrow x=-44:11=-4\)

a) (2x - 5) + 17 = 6

(2x - 5) = 6 - 17

 2x - 5 = -11

2x = -11 + 5

2x = -6

x = -6 : 2

x = -3     Vậy x = -3

b) (-18) . x = -36

               x = -36 : (-18)

               x = 2       Vậy x = 2

c) 15 - (-11x - 7) = -22

            (-11x - 7) = 15 - (-22)

            (-11x - 7) = 37

            -11x - 7    = 37

             -11x        = 37 + 7

              -11x        =  44

                   x        =  44 : (-11)

                   x        =  -4     Vậy x = -4

 ❤Nhớ k cho mk nha

#Chúc bạn học tốt❤

1. x + 2x = -36

=> 3x = -36

=> x = -36 : 3

=> x = -12

2. (2x + 3) \(⋮\)(x - 2)

=> (2x - 2) + 5 \(⋮\)(x - 2)

=> 2(x - 2) + 5 \(⋮\)(x - 2)

=> 5 \(⋮\)(x - 2)

=> x - 2 \(\in\)Ư(5) = {-5;-1;1;5}

=> x \(\in\){-3;1;3;7}

3. Khi đó a . (-b) = -132

4. -2(3x + 2) = 1² + 2² + 3²

=> -2(3x + 2) = 1 + 4 + 9

=> -2(3x + 2) = 14

=> 3x + 2 = 14 : (-2)

=> 3x+ 2 = -7

=> 3x = -7 - 2

=> 3x = -9

=> x = -9 : 3

=> x = -3

1/ \(x+2x=-36\)

\(\Rightarrow3x=-36\)

\(\Rightarrow x=-\frac{36}{3}\)

\(\Rightarrow x=-12\)

2/    \(\left(2x+3\right)⋮\left(x-2\right)\)

\(\Leftrightarrow\left(2x-4\right)+7⋮\left(x-2\right)\)

\(\Leftrightarrow2\left(x-2\right)+7⋮\left(x-2\right)\)

\(\Rightarrow7⋮\left(x-2\right)\)

\(\Rightarrow\left(x-2\right)\inƯ\left(7\right)\)

\(\Rightarrow x\inƯ\left(7-2\right)\)

\(\Rightarrow x\inƯ\left(5\right)\)

\(\Rightarrow x\in\left\{-5,1,5\right\}\)

Vậy x nhỏ nhất để \(\left(2x-3\right)⋮\left(x-2\right)\) là -5

3/ Vì \(a\cdot b=32\)

\(\Rightarrow-a\cdot b=-\left(a\cdot b\right)=-32\)

4/ \(-2\left(3x+2\right)=1^2+2^2+3^2\)

\(\Leftrightarrow-6x-4=1+4+9\)

\(\Leftrightarrow-6x=14+4\)

\(\Leftrightarrow-6x=18\)

\(\Leftrightarrow x=\frac{18}{-6}\)

\(\Rightarrow x=3\)

a) \(-45:5.\left(-3-2x\right)=3\)

\(-9.\left(-3-2x\right)=3\)

\(-3-2x=\left(3:-9\right)\)

\(-3-2x=\dfrac{-1}{3}\)

\(-2x=-3-\dfrac{1}{3}\)

-2x=\(\dfrac{-10}{3}\)

\(x=\dfrac{-10}{3}:-2\)

\(x=\dfrac{5}{3}\)

b) 

3x - 28 = x + 36

<=> 3x - x = 36 + 28

<=> 2x = 64

<=> x = 32

Vậy x = 32

c) 

(-12)2.x = 56 + 10.13.x

144.x = 56 + 130.x

144x – 130 x = 56

14x = 56

x = 56: 14

x = 4

Vậy x = 4

\(a,-45:5\cdot\left(-3-2x\right)=3\\ \Leftrightarrow-9\cdot\left(-3-2x\right)=3\\ \Leftrightarrow-2x-3=-\dfrac{1}{3}\\ \Leftrightarrow2x+3=\dfrac{1}{3}\\ \Leftrightarrow2x=-\dfrac{8}{3}\\ \Leftrightarrow x=-\dfrac{4}{3}\\ b,3x-28=x+36\\ \Leftrightarrow2x=64\\ \Leftrightarrow x=32\\ c,\left(-12\right)^2x=56+10\cdot13x\\ \Leftrightarrow144x=56+130x\\ \Leftrightarrow14x=56\\ \Leftrightarrow x=4\)

a) (x: 8 - l).2 = 1.14 nên x : 8 - 1 = 7. Do đó x =  64.

b) (2x + 3).30 = 25.6 nên 2x + 3 = 5. Do đó x = 1.

c) 6.(2x - 7) = 9.(x - 3) nên 12x - 42 = 9x - 27.

Do đó 3x = 15. Vậy x =  5.

d) -7.(x + 27) = 6.(x + l) nên -7x - 189 = 6x + 6.

Do đó 13x = -195. Vậy x = -15.

x + 2.x = -36

<=> 3.x = -36

<=> x = -36 : 3

<=> x = -12

 x + 2x = -36

=> x+2x=3x

3x=-36

x=-36 : 3

x=-12

x + 2x = - 36

x(1 + 2) = - 36

3x = - 36

=> x = - 36 : 3

=> x = - 12

1,\(54.\left(23-11\right)+23.\left(-22-54\right)\)

\(=54.12+23.\left(-76\right)\)

\(=648-1748\)

\(=-1100\)

2,\(-7+2x=-17-\left(-36\right)\)

\(=>-7+2x=-17+36\)

\(=>-7+2x=19\)

\(=>2x=19+7=26\)

\(=>x=\frac{26}{2}=13\)

3,\(5⋮2a+3\)

\(=>2a+3\inƯ\left(5\right)\)

\(=>2a+3\in\left\{-1;-5;1;5\right\}\)

\(=>2a\in\left\{-4;-8;-2;2\right\}\)

\(=>a\in\left\{-2;-4;-1;1\right\}\)

Vậy ...

54 . ( 23 - 11 ) + 23 . ( -22 - 54 )

=54.23-54.11+23.-22-23.54

=-54.11+23.-22

=-22(27+23)

=-22.50

=-1100

-7 + 2x = -17 - ( -36 ) 

-7+2x=-17+36

-7+2x+17-36=0

-26+2x=0

2x=26

x=13

Vậy x=13

Để \(5⋮\left(2a+3\right)\Leftrightarrow\left(2a+3\right)\inƯ\left(5\right)\)

\(\Leftrightarrow\left(2a+3\right)\in\left\{\pm1;\pm5\right\}\)

\(\Leftrightarrow a\in\left\{-1;-2;1;-4\right\}\)

Bài 1:

54. (23-11) + 23.(-22-54) = 54.23-11.54 -23.22 - 54.23

                                        = (54.23-54.23) -(11.54+23.22)

                                        = 0 - (11.54 +23.11.2)

                                        = 0 - 11.(54+23.2)

                                        = 0 - 11. 100

                                       = -1100

Bài 2:                        -7 +2x = -17 -(-36)

                                  -7 +2x = 19

                                       2x  = 26

                                         x  = 13

Bài 3:        Ta có: \(5⋮\left(2a+3\right)\) 

\(\Rightarrow2a+3\inƯ\left(5\right)\)

\(\Rightarrow2a+3\in\left\{-5;-1;1;5\right\}\)

\(\Rightarrow2a\in\left\{-8;-4;-2;2\right\}\)

\(\Rightarrow a\in\left\{-4;-2;-1;1\right\}\)