Respuesta :

awhkass
We know that the angle of a straight line is 180°.

So we know that (5x-5) + (2x+10) = 180
We will then solve for x

5x - 5 + 2x + 10 = 180

7x + 5 = 180

7x = 175

x = 25 (just an explanation of how we get 25)

To get angle 1, we will then plug in x=25 into the first equation to get

5(25)-5 = 125-5 = 120°

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