Respuesta :

jhonyy9
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 
Tina026

Answer:

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

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