Answer:
x=7
Explanation:
Vertical angles are equal
5x-9 = 8x-30
Subtract 5x from each side
5x-9-5x= 8x-30-5x
-9 = 3x-30
Add 30 to each side
-9+30 = 3x-30+30
21 = 3x
Divide by 3
21/3 = 3x/3
7 = x
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