2 answers:
2x +9 = 3x - 1
2x - 3x = -9 -1
-x = -10
x = 10
2(10) + 9 = 29
so angles 1 and 3 measure 29 degrees
360 - 2(29) = 302 degrees
302/2 = 151 degrees
so angles 1 and 3 measure 151 degrees
2x + 9 = 3x - 1
9 + 1 = 3x - 2x
10 = x
2(10) + 9 = 29
angle 1 and 3 is 29°
180 - angle 3 = angle 4
180 - 29 = 151
angle 4 and 2 is 151°
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