The answer to your question is 30+4.+10+4
Change x to y, and y to x.
solve for y:
Your answer is:
Answer is A, y = 65
The top angle is 50 because 180 - 130 = 50
Since the top angle is 50, the two bottom angles have to add up to 130. Since the bottom angles are the same, you can do 130 / 2 to find the angles which equals 65.