Respuesta :

Answer:

x = 10.

Step-by-step explanation:

As the 2 angles at the vertex are congruent we can say that:

12 / 3x + 2 = 9 / (33-9)

12/3x+2 = 9/24 = 3/8

3(3x+2) = 12*8

9x + 6 = 96

9x = 90

x = 10.

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