We have to find the exact value of
And it can also be written as
And
So we will get
Your answer should be in one variable equation by using the Y and W angle. They are equal if you match with the same angle size.
7x=6x+11
(7-6)x = 11
x = 11
We got the x value, so suvtitute into W angle :
7x
=7(11)
= 77
Hope this helps :)