Respuesta :

gmany

Answer:

C. 3x + 80 + 2x = 180

Step-by-step explanation:

The straight line creates an angle of 180 °.

Therefore from the picture we have the equation:

3x + 80 + 2x = 180        subtract 80 from both sides

5x = 100           divide both sides by 5

x = 20

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