Question

find the measure of an angle which is 2 upon 3 of its supplement​

Answer 1

Let x and y be the two angles 

They are supplement means x+y=180∘

Now one angle is two third of another which 

means x=2y/3 

putting in to equation 

32y+y=180∘

⇒32y+3y=180∘

⇒5y=180×3

⇒y=5180×3

⇒y=108

y=108

x=32y=32⋅108=72

∴x=72 and y=108.