Respuesta :

Answer:

x is equal to 20, or the answer A

Step-by-step explanation:

They are opposite angles so they are equal to each other. When you set up the equation (x+40)=3x, you get the answer to be 20. hope this helped!

carlosego

For this case we have to define by opposite angles the vertex that:

[tex]x + 40 = 3x[/tex]

Subtracting 3x on both sides of the equation:

[tex]x-3x + 40 = 0\\-2x + 40 = 0[/tex]

Subtracting 40 from both sides of the equation:

[tex]-2x = -40[/tex]

Dividing between -2 on both sides of the equation:

[tex]x = \frac {-40} {- 2}\\x = 20[/tex]

So, we have that [tex]x = 20[/tex]

ANswer:

[tex]x = 20[/tex]

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