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x = 2x X x = 180
x = 180 - 90
x = 90
3x = 180
x = 60
B. 40 +2x + 34 = 180
74 + 2x = 180
2x = 106
x = 53
C. 30 + 2x +60 = 180
2x +90 = 180
2x = 90
x = 45
D. 3x + 2x +x = 90
6x = 90
x = 15