SOLUTION: The second angle of a triangle is 18 degrees more than twice the first. The third angle is three times as large as the second. How large are the angles?

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Question 54283: The second angle of a triangle is 18 degrees more than twice the first. The third angle is three times as large as the second. How large are the angles?
Answer by Nate(3500) About Me  (Show Source):
You can put this solution on YOUR website!
First angle = x
Second angle = 2x + 18
Third angle = 3(2x + 18) = 6x + 54
x + 2x + 18 + 6x + 54 = 180
9x + 72 = 180
9x = 108
x = 12
First angle = 12 degrees
Second angle = 42 degrees
Third angle = 126 degrees