SOLUTION: if find the ratio of the angle to its supplementary

Question 936404: if find the ratio of the angle to its supplementary
Answer by srinivas.g(540) (Show Source): You can put this solution on YOUR website!
Two Angles are Supplementary if they add up to 180 degrees
ley x,y be the supplementary angles
x+y=180.............eq(1)
an angle is 20 degrees less than thrice its supplement
x= 3*y-20
put x =3y-20 in x+y=180
(3y-20)+ y =180
3y+y-20=180
4y-20 = 180
move -20 to the right
4y =180+20
4y =200
divide with 4 on both sides

y =50
x= 3*50-20
=150-20
=130
so x=130
y= 50
ration x: y = 130:50
=13:5
Result : ratio =13:5
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