`123-5(x+4)=38`

`5x-20=123-38`

`5x-20=85`

`5x=85+20`

`5x=105`

`x=105:5`

`x=21`

123-5.(x+4)=38

         5x-20=123-38

         5x-20=85

               5x=85+20

               5x=105

                 x=105:5

                x=21

123 – 5(x + 4) = 38

5(x + 4) = 123 – 38

5(x + 4) = 85

x + 4 = 85 : 5

x + 4 = 17

x = 17 – 4

x = 13

Vậy x = 13

a) x-12=-15
x=-15+12
x=-3
b) 123-5(x+4)=38
5(x+4)=123-38
5(x+4)=85
x+4=85:5=17
x=17-4
x=13

\(a.x-12=-15\)                    \(b.123-5.\left(x+4\right)=38\)

\(x=\left(-15\right)+12\)                        \(5.\left(x+4\right)=123-38\)

\(x=-3\)                                      \(5.\left(x+4\right)=85\)           

                                                   \(x+4=85:5=17\)

                                                    \(x=17-4=13\)

a) x-12=-15
x=-15+12
x=-3
b) 123-5(x+4)=38
5(x+4)=123-38
5(x+4)=85
x+4=85:5=17
x=17-4
x=13

123 - 5 x ( x - 4 ) = 38 

        5 x ( x - 4 ) =123 - 38 

        5 x ( x - 4 ) = 85

              ( x - 4 ) = 85 : 5 

              ( x - 4 ) = 17 

                x        = 17 + 4

                x        = 21

vậy x = 21

123 - 5 x ( x + 4 ) = 38

5 x ( x + 4 ) = 123 - 38

5 x ( x + 4 ) = 85

( x + 4 ) = 85 : 5

x + 4 = 17

x = 17 - 4

x = 13

 Vậy x = 13

123 - 5 x ( x + 4 ) = 38

5 x ( x + 4 ) = 123 - 38

5 x ( x + 4 ) = 85

( x + 4 ) = 85 : 5

x + 4 = 17

      x = 17 - 4

      x = 13

123 - 5.(x + 4) = 38

=> 5.(x + 4) = 123 - 38

=> 5.(x + 4) = 85

=> x + 4 = 85 : 5

=> x + 4 = 17

=> x = 17 - 4 

=> x = 13

=> 5(x + 4) = 123 - 38

=> 5(x + 4) = 85

=> x + 4 = 85:5

=> x + 4 = 17

=> x = 17 - 4

=> x = 13

Tìm số tự nhiên x ,biết:

123 - 5. (x+4) = 38

      5. (x+4) = 123-38

      5.(x+4)=85

          x+4-85/5

          x+4= 17

x= 17-4=13

123 - 5 . ( x + 4 ) = 38

        5 . ( x + 4 ) = 123 - 38

         5 . ( x + 4 ) = 85

                x + 4 = 85 : 5

                x + 4 = 17

                       x = 17 - 4

                       x = 13

Nhớ tick cho mik nha !!!

123-5x-20=38

-5x=-65

x=-65:(-5)

x=13

tick nha

123-5.(x+4)=38

5.(x+4)=123-38

5.(x+4)=85

x+4=85:5

x+4=17

x=17-4

x=13

123 - 5 . ( x + 4 ) = 38

5 . ( x + 4 ) = 123 - 38

5 . ( x + 4 ) = 85

x + 4 = 85 : 5

x + 4 = 17

      x = 17 - 4

      x = 13

( 3x - 2⁴ ) . 7³ = 2 . 7⁴

( 3x - 16 ) . 343 = 2 . 2401

( 3x - 16 ) . 343 = 4802

3x - 16 = 4802 : 343

3x - 16 = 14

3x = 14 + 16

3x = 30

  x = 30 : 3

  x = 10

123 - 5( x + 4 ) = 38

=> 5( x + 4 ) = 123 - 38

=> x + 4 = 85 ÷ 5

=> x = 17 - 4 

=> x = 13

(3x - 2⁴ ) · 7³ = 2·7⁴

=> ( 3x - 16 ) = 2 . 7⁴ ÷ 7³

=> 3x - 16 = 14

=> 3x = 16 + 14

=> x = 30 ÷ 3 

=> x = 10

123 - 5(x + 4) = 38

=> 5(x + 4) = 85

=> x + 4 = 17

=> x = 13

vậy_

(3x - 24).73 = 2.7

=> (3x - 24).73 = 14

=> 3x - 24 = 1022

=> 3x = 1046

=> x = 1046/3