Question

I'm confused on it i need a explanation

Answer 1

x = 19°

Explanation:

• are adjacent angles, so the sum is 180°

so

8x-7+x+16=180°

9x = 180 + 7 - 16

9x = 171

x = 171 : 9

x = 19

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check

8 * 19 - 7 + 19 + 16 = 180 (remember PEMDAS)

180 = 180

the answer is good