`120-4xx(x+8)=80`
`4xx(x+8)=120-80`
`4xx(x+8)=40`
`x+8=40/4`
`x+8=10`
`x=10-8`
`x=2`
`120 - 4 xx ( X + 8 ) = 80`
` 4 xx ( X + 8 ) = 120 - 80`
`4 xx ( X + 8 ) = 40`
` X + 8 = 40 : 4`
` X + 8 = 10`
` X = 10 - 8`
` X = 2`
\(120-4\times\left(x+8\right)=80\)
\(4\times\left(x+8\right)=120-80\)
\(4\times\left(x+8\right)=40\)
\(x+8=40\div4\)
x+8=10
x=10-8
x=2