SOLUTION: the measure of an angle is twice the measure of its supplementary angle.find its measure

Question 474984: the measure of an angle is twice the measure of its supplementary angle.find its measure
Found 2 solutions by stanbon, poetdragon:
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
the measure of an angle is twice the measure of its supplementary angle.find its measure
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Equations:
x + y = 180 degrees
x = 2y
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Substitute and solve for "y":
2y+y = 180
y = 60 degrees
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x = 2y = 120 degrees
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Cheers,
Stan H.
Answer by poetdragon(1) (Show Source): You can put this solution on YOUR website!
Given:
let x = 1st angle
let 2x = 2nd angle
Solution:
x+2x=180
3x=180
3x/3 = 180/3
x = 60
Answer:
1st angle is 60 degrees
2nd angle is 120 degrees

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