Respuesta :

Kamikazeminem

[tex]7x + x + 20 = 180\Leftrightarrow 8x = 160\Leftrightarrow x = 20[/tex]

wegnerkolmp2741o

Answer:

x=20

Step-by-step explanation:

The two angles add together to form a straight line, which is 180 degrees.

7x + (x+20) = 180

Combine like terms

8x+20 = 180

Subtract 20 from each side

8x+20-20 = 180-20

8x =160

Divide each side by 8

8x/8 = 160/8

x = 20