Bài này dễ mà
123 - 5 . ( x + 4 ) = 38
5 . ( x + 4 ) = 123-38
5 . ( x + 4 ) = 85
5 . ( x + 4 ) = 85
( x + 4 ) = 85 : 5
( x + 4 ) = 17
x = 17 - 4
x = 13
Vậy 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 = 13
\(123-5\left(x+4\right)=38\)
\(5\left(x+4\right)=123-38\)
\(5x+4=85\)
\(x+4=85:5\)
\(x+4=17\)
\(x=17-4\)
\(\Rightarrow x=13\)
\(123-5\times\left(x+4\right)=38\)
\(5\times\left(x+4\right)=123-38\)
\(5\times\left(x+4\right)=85\)
\(x+4=\frac{85}{5}\)
\(x+4=17\)
\(x=17-4\)
\(x=13\)
5.(x+4)=123-38
=> x+4= 85:5
=> x=17-4
=> x=13
\(123-5\left(x+4\right)=38\)
\(5\left(x+4\right)=123-38\)
\(5\left(x+4\right)=85\)
\(x+4=85:5\)
\(x+4=17\)
\(x=17-4\)
\(x=13\)
123-5.(x+4)=38
123-5.(x+4)=123-38
5.(x+4)=85
x+4=85-5
x+4=80
x=80-4
x=76