What is the angle if it is known that it is 40 ° greater than the angle adjacent to it?

the sum of this angle and the adjacent angle is 180 degrees.
denote the adjacent angle by x, then the second angle will be equal to (x + 40) degrees.
x + 2x = 180
3x = 180
x = 60, desired angle = 60 + 40 = 100 degrees



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