SOLUTION: the angles of a triangle are(x-40)•,(x-20)• and (1/2x-10)•. find x

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Question 768929: the angles of a triangle are(x-40)•,(x-20)• and (1/2x-10)•. find x
Answer by Cromlix(4381) About Me  (Show Source):
You can put this solution on YOUR website!
(x - 40)+(x - 20) + (1/2x - 10) = 180
x - 40 + x - 20 + 1/2x - 10 = 180
2 1/2x = 180 + 70
2 1/2x = 250
x = 100 degrees.
Hope this helps.
:-)