As the expressions given are a straight line, considering that a straight line has an angle of 180°, we can do the following:
[tex](4x-8)+(2x+8)=180[/tex]Solving for x:
[tex]4x-8+2x+8=180[/tex][tex]6x=180[/tex][tex]x=\frac{180}{6}=30[/tex]Answer: x = 30 °