Respuesta :

greenforestaz

Answer:

step 1. DBE ~ ABC

step 2. (x + 5)/4 = (2x + x + 5)/(4 + 3)

step 3. ( x + 5)/4 = (3x + 5)/7

step 4. 7x + 35 = 12x + 20

step 5. 5x = 15

step 6. x = 3.

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