D. (2x + 3) + (x - 6) = 180
This equation represents the sum of the two adjacent angles being equal to 180 degrees, because angles forming a straight line add up to 180 degrees.
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the angles are (2x + 3) and (x - 6)
Which equation can be used to determine the measure of these two adjacent angles?
A. 2x + 3 = x - 6
B. (2x + 3) + (x - 6) = 90
C. (2x + 3) - (x + 6) = 180
D. (2x + 3) + (x - 6) = 180
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