angles 1 and 3 are vertical angles, meaning that they are equal to each other. to solve this you may set angle 1 and 3 equal to each other and just solve for x like
110 = 2x + 10
100 = 2x
50 = x
check:
110 = 2* 50 + 10
110 = 100 + 10
110 = 110
hope this !
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Answer from: Quest
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