Answer:
x=25
Explanation:
(5x-10)=(3x+40) because from what I understand they are vertical angles
5x-3x=40+10
2x=50
angles are vertical angles so they are equal
set expressions equal to each other: 5x-10=3x+40
subtract 3x from both sides: 2x-10=40
add 10 to both sides: 2x=50
divide by 2: x=25
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