Respuesta :

unicorn3125

Answer:

          x = 3

Step-by-step explanation:

(10x+1)° and (12x-5)° are vertex angles.

The measures of vertex angles are the same so:

10x + 1 = 12x - 5

10x - 12x = -5 - 1

  -2x = -6

     x = 3

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