Answer:
(2-c,y)
Step-by-step explanation:
idk this is what algebra nation told me so yeah
15, because 3 goes into 9, 3 times and, 4 goes into 12, 3 times therefore x has to follow this rule because these 2 triangles are similar and because it already gives you 5 just take 5*3=15 there is your answer enjoy!=)