Respuesta :

serajom
using the relation of similar triangles...

(12 + 4)/6x = 12/(5x -2)
16/6x = 12/(5x - 2)
8/3x = 12/ (5x -2)
8(5x - 2) = 12(3x)
40x - 16 = 36x
40x - 36x = 16
4x = 16
x = 4

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