Respuesta :

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4n - 2 + 90 + 3n + 8 = 180

7n + 96 = 180

7n = 84

n = 12

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Answer:

Straight angle measures 180°.

(4n - 2) + 90 + (3n + 8) = 180

4n - 2 + 90 + 3n + 8 = 180.

7n + 96 = 180

7n = 180 - 96

7n = 84

n = 84/7

•°• n = 12

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