Respuesta :

josshyaby

Answer:

15

Step-by-step explanation:

Let the left side of the triangle be 2Y for the bigger triangle and then the smaller one will be Y.

Comparing the two triangle

2Y/Y = 30/X

2 = 30/X

Cross multiple

2X = 30

Dividing by 2

X = 30/2

X = 15

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