SOLUTION: in triangle ABC wht is the degree measure of angle A? A=x+10 degree B=2x-20 degree C=40 degree

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Question 757554: in triangle ABC wht is the degree measure of angle A?
A=x+10 degree
B=2x-20 degree
C=40 degree
Answer by reviewermath(1029) About Me  (Show Source):
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Q:
in triangle ABC what is the degree measure of angle A?
A=x+10 degree
B=2x-20 degree
C=40 degree
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A:
The sum of the interior angles of any triangle is 180 degrees.
(x + 10) + (2x - 20) + 40 = 180
3x + 30 = 180
x = (180 - 30)/3
x = 50
angle A = 50 + 10 = highlight%2860%29 degrees