Respuesta :

Answer:

52

Step-by-step explanation:

From ∆ABO and ∆BOC,

2(3x-7)=4x+8

2(3x-7)=2(2x+4)

3x-7=2x+4

3x-2x=4+7

x=11.

Now, BC =4x+8= 4×11+8=52

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