Anaaguayo7406
29.08.2019 •
Biology
Environmental sociology is concerned with
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Ответ:
Ответ:
20 =x
Step-by-step explanation:
The angles are vertical angles and vertical angles are equal
x+40 = 3x
Subtract x from each side
x+40-x = 3x-x
40 = 2x
Divide by 2
40/2 = 2x/2
20 =x