\(123-5\left(x+4\right)=38\\ 5\left(x+4\right)=85\\ x+4=17\\ x=13\)

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

\(\Rightarrow123-5x-20=38\)

\(\Rightarrow-5x=-65\)

\(\Rightarrow x=13\)

Vậy: ...

\(123-5x-20=38\Leftrightarrow123-5x=58\Leftrightarrow5x=65\Leftrightarrow x=13\)

`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

\(123-5\left(x:2+4\right)=38\\ \Rightarrow5\left(x:2+4\right)=85\\ \Rightarrow x:2+4=17\\ \Rightarrow x:2=13\\ \Rightarrow x=26.\)

\(123-5\left(x:2+4\right)=38\)

\(5\left(x:2+4\right)=123-38\)

\(5\left(x:2+4\right)=85\)

\(x:2+4=85:5\)

\(x:2+4=17\)

\(x:2=17-4\)

\(x:2=13\)

\(x=13.2\)

\(x=26\)

\(123-5\left(x:2+4\right)=38\\ 5\left(x:2+4\right)=85\\ x:2+4=17\\ x:2=13\\ x=26\)

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=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
 

Giải:

\(123-5\left(x-4\right)=38\)

\(\Leftrightarrow5\left(x-4\right)=123-38\)

\(\Leftrightarrow5\left(x-4\right)=85\)

\(\Leftrightarrow x-4=\dfrac{85}{5}\)

\(\Leftrightarrow x-4=17\)

\(\Leftrightarrow x=17+4\)

\(\Leftrightarrow x=21\)

Vậy \(x=21\).

Chúc bạn học tốt!!!

123-5(x+4)=38

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

Chúc bạn học tốt nha

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

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

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

                      \(x+4=85\div5\)

                      \(x+4=17\)

                      \(x=17-4\)

                      \(x=13\)

            Chúc bn hk tốt nhoa :) 

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

Chúc bn học tốt

5*(x-4)=123-38

5*(x-4)=85

x-4=85:5

x-4=17

x=17+4

x=21

5*(x-4)=123-38

5*(x-4)=85

x-4=85:5

x-4=17

x=17+4

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 = 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

k mk nha mấy bạn

123-5.(x+4)=38

       5.(x+4)=123-38

       5.(x+4)=85

           x+4  =85:5

           x+5  =17

                 x=17-5

                 x=12

xin loi to bi nham nha 

kq dung la =13

chuc bn hoc gioi!

nha@

 123 -5 *( x+4) = 38

5*(x+4)=85

x+4=17

x=3

123-5.(x+4)=38

5(x+4)=85

x+4=17

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

Vậy x =13