72 – (4x + 24) = 936

        4x+24=936-72

        4x+24=864

        4x      =864-24

        4x      =    840

          x      =    840:4

          x      =      210.

Vậy x=210.

4x + 24 = 72 - 936

4x + 24 = -864

4x         = -864 - 24

4x         = -888

  x         = -888 : 4

  x         = -222

72 - (4x+24)=936

4x+24=72-936

4x+24=-864

4x =-864-24

4x=-888

x=-888:4

x=-222

tk minhyfnha, đúng 100%, violimpic 300 ddieemr làm sai rùi

936 - ( x + 24 ) = 72

936 - x - 24 = 72

912 - x=72

x=840

5 . (x + 35 ) = 515

x+35=515:5

x+35=103

x=68

(158 - x ) :7 = 20

158 - x=20x7

158 - x=140

x=18

936-(x+24)=72

        X+24=936-72

        X+24=864

        X=864-24

        X=840

5.(x+35)=515

X+35=515:5

X+35=103

X=103-35

X=68

(158-x):7=20

158-x=20.7

158-x=140

X=158-140=18

K biết đúng hay sai hì hì, mong thông cảm ạ*cúi đầu*

a) 936 - ( x + 24 ) = 72

 x + 24 = 936 - 72

x + 24 = 864

x = 864 - 24 

x = 840

b) 5 . ( x + 35 ) = 515

x + 35 = 515 : 5

x + 35 = 103

x = 103 - 35

x = 68

c) ( 158 - x ) : 7 = 20 

158 - x = 20 . 7 

150 - x = 140 

x = 158 - 140 

x = 18 

Bài làm :

a) 936 - ( x + 24 ) = 72

x + 24 = 936 - 72

x + 24 = 864 

x = 840 

b) 1635 - ( x - 39 ) = 482 

x - 39 = 1635 - 482 

x - 39 = 1153

x = 1192

c) 2750 - ( 85 - x ) = 2670 

85 - x = 2750 - 2670

85 - x = 80

x = 5 

Học tốt nhé

936-(x+24)=72 => (x+24)=936-72 =>(x+24)=864 =>x=864-24 =>x=840

vậy x=840

1635-(x-39)=482 =>(x-39)=1635-482=>(x-39)=1153=>x=1153+39=>x=1192

vậy x=1192

2750-(85-x)=2670=>(85-x)=2750-2670=>(85-x)=80=>x=85-80=>x=5

vậy x=5

a, 936 - ( x + 24 ) = 72

<=> x + 24 = 936 - 72

<=> x + 24 = 864

<=> x = 840

Vậy x = 840

b, 1635 - ( x - 39) = 482

<=> x - 39 = 1635 - 482

<=> x - 39 = 1153

<=> x = 1192

Vậy_

c,tuong tu

a) 70 - 5.(2x-3)=45

5.(2x-3)=70-45

10x-15 =25

10x     =25 +15

10x     =40

x        =40:10

x        = 4

b)6.(5x+35) =330

5x +35 = 330 : 6

5x +35 =55

5x = 55-35

5x = 20

x = 20 : 5

x = 4

c)936-(4.x+24)=72

4x+24 =936 - 72

4x+24 =864

4x = 864 - 24

4x = 840

x = 840 :4

x = 210

d)(x+1)+(x+3)+(x+5)

x+1+x+3+x+5=30

(x+x+x)+(1+3+5) = 30

3x + 9 =30

3x = 30-9

3x =21

x = 21 : 3

x = 7

e)Vì số lượng x bằng  số số hạng nên số lượng x là :

(100 - 2) : 2 + 1 = 50 (số x)

Tổng 2 +4+6+8+...+100 là :

(100+2) x 50 : 2 = 2550

Ta có :

50 x + 2550 = 2650

50x = 2650 -2550

50x = 100

x = 100 : 50

x = 2

Tick nghen !

a, \(231-\left(x-6\right)=1339:13\)

\(\Leftrightarrow231-\left(x-6\right)=103\)

\(\Leftrightarrow x-6=128\)

\(\Leftrightarrow x=134\)

Vậy .....

b, \(70-5\left(2x-3\right)=45\)

\(\Leftrightarrow5\left(2x-3\right)=25\)

\(\Leftrightarrow2x-3=5\)

\(\Leftrightarrow2x=8\)

\(\Leftrightarrow x=4\)

Vậy ....

c, \(156-\left(x+61\right)=82\)

\(\Leftrightarrow x+61=74\)

\(\Leftrightarrow x=13\)

Vậy ....

d, \(6\left(5x+35\right)=330\)

\(\Leftrightarrow5x+35=55\)

\(\Leftrightarrow5x=20\)

\(\Leftrightarrow x=4\)

Vậy ......

e, \(936-\left(4x+24\right)=72\)

\(\Leftrightarrow4x+24=864\)

\(\Leftrightarrow4x=840\)

\(\Leftrightarrow x=210\)

Vậy ...

231-(x-6)=1339:13

237-x=103

=>x=237-103=134

Vậy x=134

70-5(2x-3)=45

70-10x+15=45

=>-10x=45-15-70=-40

=>x=4

Vậy x=4

Các caau sau tương tự nhé bn

a, 231 - ( x - 6 ) = 1339 : 13

231 - ( x -6 ) = 103

x - 6 = 231 - 103 = 128

x = 128 + 6 = 134

b, 70 - 5 (2x -3 ) = 45

5 ( 2x -3 ) = 70 - 45 = 25

( 2x -3 ) = 25 : 5 = 5

2x = 5 + 3 = 8

x = 8 : 2 = 4

c, 156 - ( x + 61 ) = 82

x + 61 = 156 - 82 =74

x = 74 - 61

x = 13

d, 6 ( 5x + 35 ) = 330

5x + 35 = 330 : 6 = 55

5x = 55 - 35 = 20

x = 20 : 5 = 4

e, 936-(4x+ 24 ) = 72

4x + 24 = 936 - 72 = 864

4x = 864 - 24 = 840

x = 840 : 4 = 210

Chuc ban hoc tot nhe

a) \(70-5\left(2x-3\right)=45\)

\(70-10x+15=45\)

\(-10x=45-70-15\)

\(-10x=-40\)

\(x=4\)

vay \(x=4\)

 b) \(156-\left(x+61\right)=82\)

\(x+61=156-82\)

\(x+61=74\)

\(x=74-61\)

\(x=13\)

vay \(x=13\)

c) \(6\left(5x+35\right)=330\)

\(30x+210=330\)

\(30x=330-210\)

\(30x=120\)

\(x=4\)

vay \(x=4\)

d) \(936-\left(4x+24\right)=72\)

\(4x+24=936-72\)

\(4x+24=864\)

\(4x=864-24\)

\(4x=840\)

\(x=210\)

vay \(x=210\)

\(70-5.\left(2x-3\right)\)\(=45\)

\(5.\left(2x-3\right)\)\(=\)\(70-45\)

\(5.\left(2x-3\right)\)\(=25\)

\(2x-3=25:5\)

\(2x-3=5\)

\(2x=8\)

\(x=8:2\)

\(x=4\)

\(156-\left(x+61\right)\)\(=82\)

\(x+61=156-82\)

\(x+61=74\)

\(x=74-61\)

\(x=13\)

\(6.\left(5x+35\right)\)\(=330\)

\(5x+35=330:6\)

\(5x+35=55\)

\(5x=55-35\)

\(5x=20\)

\(x=20:5\)

\(x=4\)

\(936-\left(4x+24\right)\)\(=72\)

\(4x+24=936-72\)

\(4x+24=864\)

\(4x=864-24\)

\(4x=840\)

\(x=840:4\)

\(x=210\)

Tìm x :

a) 70 - 5 . ( 2x - 3 ) = 45

           5 . ( 2x - 3 ) = 70 - 45

           5 . ( 2x - 3 ) = 25

                    2x - 3 = 25 : 5

                    2x - 3 = 5

                         2x = 5 + 3

                         2x = 8

                           x = 8 : 2

                           x = 4

b)    156 - ( x + 61 ) = 82

                     x + 61 = 156 - 82

                     x + 61 =  74

                             x = 74 - 61

                             x = 13

c) 6 . ( 5x + 35 ) = 330

             5x + 35 = 330 : 6

             5x + 35 = 55

                     5x = 55 - 35

                     5x = 20

                       x = 20 : 5 

                       x = 4

d) 936 - ( 4x + 24 ) = 72

                  4x + 24 = 936 - 72

                  4x + 24 = 364

                          4x = 364 - 24

                          4x = 340

                            x = 340 : 4

                            x = 85

a. 231-(x-6)=103

-(x-6)=-128

(x-6)=128

x=134

b. 4x-7=4704-9x-2566

4x+9x=4704-2566+7

13x=2145

x=165

c. 294=6x+90

6x=204

x=34

d. 936-4x-24=72

-4x=-840

4x=840

x=210

g: =>3x-10=200

hay x=70

c) (7x + x – 28) :100 – 38 = 9

<=> 8x - 28 = 4700

<=> x = 591

d) 936 – (4x + 5x ) = 900

<=> 9x = 36

<=> x = 4

a)   70 - 5 ( 2x-3 ) = 45

              5( 2x-3 ) = 25

                  2x - 3 = 25 : 5

                 2x - 3  = 5

                       2x = 8 

                         x = 8 : 2

                        x = 4

b)   6 ( 5x + 35 ) = 330

    5x + 35 = 330 : 6

    5x + 35 = 55

            5x = 55 - 35

            5x = 20

              x = 20 : 5

              x = 4 

c)  936 - ( 4x + 24 ) = 72

     4x + 24 = 936 - 72

     4x + 24 = 864

             4x = 864 - 24

             4x = 840

              x = 840 : 4

              x = 210

 d)   5( 3x + 34 ) = 515

             3x + 34 = 515 : 5

             3x + 34 = 103

                     3x = 103 -  34

                     3x = 69

                       x = 69 : 3

                      x = 23

\(a,70-5\left(2x-3\right)=45\)

\(\Leftrightarrow10x-15=70-45\)

\(\Leftrightarrow10x=25+15\)

\(\Leftrightarrow x=\frac{40}{10}=4\)

Vậy x=4

\(b,6\left(5x+35\right)=330\)

\(\Leftrightarrow5x+35=55\)

\(\Leftrightarrow5x=20\)

\(\Leftrightarrow x=4\)

vậy x=4

\(c,936-\left(4x+24\right)=72\)

\(\Leftrightarrow4x+24=936-72\)

\(\Leftrightarrow4x=864-24\)

\(\Leftrightarrow x=840:4=210\)

Vậy x=210

\(d,5\left(3x+34\right)=515\)

\(\Leftrightarrow3x+34=515:5\)

\(\Leftrightarrow3x=103-34\)

\(\Leftrightarrow x=69:3=23\)

Vậy x=23