SOLUTION: the measure of angle b is 2 times the measure of its supplement what is the measure of angle b solve for the supplement 2x+x=180 then find angle b 2x=___ degrees

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Question 1010214: the measure of angle b is 2 times the measure of its supplement what is the measure of angle b solve for the supplement 2x+x=180 then find angle b 2x=___ degrees
Answer by fractalier(6550) About Me  (Show Source):
You can put this solution on YOUR website!
We write this is
b = 2(180 - b)
b = 360 - 2b
3b = 360
b = 120 degrees