<PRE><B>Question 365989</B>
sum of the angles of a triangle is 180.
first angle is x.
second angle is 2*x
third angle is x + 20.


x + 2*x + x + 20 = 180


combine like terms to get 4*x + 20 = 180


subtract 20 from both sides of the equation to get:


4*x = 160


divide both sides of the equation by 4 to get:


x = 160/4 = 40


the first angle is 40 degrees.
the second angle is 80 degrees.
the third angle is 60 degrees.


40 + 80 + 60 = 180 degrees.

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