Question 498059
A = 3x
B = x
C = x + 45
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3x + x + x + 45 = 180.
5x + 45 = 180
5x = 135
x = 27
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A = 3(27) = 81 degrees
B = 27 degrees
C = 27 + 45 = 72 degrees.
72 + 27 + 81 = 180 degrees.
This does check.
Cleomenius.