Respuesta :

choixongdong

Answer:

5

Step-by-step explanation:

It's a right triangle so 7x + 11x = 90

Solve for x

7x + 11x = 90

18x = 90

  x = 5
11x+7x+90=180
Minus 90 on both sides

18x=90
Divided 18 on both sides
X=5

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