Question

What is the value of x 20 35 60 70

Answer 1

x+40 =3x (vertical angles)
2x = 40
x = 20

answer is A. 20 (first choice)

Answer 2

Value of x is:

20

Explanation:

Clearly, the two angles are vertically opposite

and vertically opposite angles are always equal

So, x+40=3x

Subtracting both sides by x, we get

x+40-x=3x-x

i.e. 40= 2x

Dividing both sides by 2, we get

x = 20

Hence, Value of x is:

20