SOLUTION: Angles X and Y are supplementary angles. Angle X is 3 times the measure of angle Y. What is the measure of angle X?

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Question 1133333: Angles X and Y are supplementary angles. Angle X is 3 times the measure of angle Y. What is the measure of angle X?
Found 3 solutions by MathLover1, MathTherapy, Alan3354:
Answer by MathLover1(20850) About Me  (Show Source):
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supplementary angles are two angles whose sum is 180°
if angles X and Y, we have
X%2BY=180°
if angle Xis 3 times the measure of angle Y, we have
X=3Y
=> 3Y%2BY=180°
4Y=180°
Y=180%2F4°
Y=45°

=>X=3Y
X=3%2A45
X=135°


Answer by MathTherapy(10552) About Me  (Show Source):
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Angles X and Y are supplementary angles. Angle X is 3 times the measure of angle Y. What is the measure of angle X?
As one angle is X, the other (Y) is: 180 - X

We then get: X = 3(180 - X)  

X = 540 - 3X

X + 3X = 540

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That's ALL!!

Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
Angles X and Y are supplementary angles. Angle X is 3 times the measure of angle Y. What is the measure of angle X?
---------
X + Y = 180
X = 3Y
-----------
3Y + Y = 180
etc