Answer: x = 65
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Explanation:
We have a pair of vertical angles. The angles do not need to align vertically to be considered vertical angles. They simply just need to be opposite one another in this X configuration as the diagram shows.
Vertical angles are always congruent.
Set the expressions equal to one another. Solve for x.
2x+15 = 145
2x = 145-15 ... subtracting 15 from both sides
2x = 130
x = 130/2 .... dividing both sides by 2
x = 65
