Question

In the figure below, the segment is parallel to one side of the triangle. Find the value of y


9
12
15 3/4
19

Answer 1

write the proportionality of sides 

6/y = 14/21 

6*21 = 14y divide both sides by 7

6*3 = 2y

18 = 2y

y = 18/2

y = 9

hope helped 

Answer 2

Answer:

I just did the lesson. I can confirm the answer is 9