Question

What is the value of x? a)20 b)35 c)60 d)70

Answer 1

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

$x + 40 = 3x$

Subtracting 3x on both sides of the equation:

$x-3x + 40 = 0\\-2x + 40 = 0$

Subtracting 40 from both sides of the equation:

$-2x = -40$

Dividing between -2 on both sides of the equation:

$x = \frac {-40} {- 2}\\x = 20$

So, we have that $x = 20$

ANswer:

$x = 20$

Answer 2

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!