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I really need help on this question and I don't get it. please include work. Will give credit

I really need help on this question and I dont get it please include work Will give credit class=

Respuesta :

if i am correct i think it is 3× = 78 +×-2 idk but i think it that hopefully u get it right :)
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Answer:

3x= 78+x-2

Step-by-step explanation:

The 2 angles in the triangle must add up to 3x because assume the angle not labeled is y and the 3 angles within the triangle must add up to 180. And 3x+y =180(vertical line)

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