Answer: y = 70
Explanation:
Since 6x - 100 is the same angle as both 2x + 40, and 3y - 100, we can hopefully solve the equation by using this formula:
6x - 100 = 2x + 40 (add/subtract to simplify)
4x = 140 (divide by 4)
x = 35
This means that the angle measure is 2(35) + 40, or, 70 + 40 which is 110. If you take the angle measure and use it in the equation below, you get your answer
3y - 100 = 110 (add/subtract to simplify)
3y = 210 (divide by 3)
y = 70
hope this helps :)