Question

calculate value of x and y in supplementary angle in which y=x/2

Answer 1

y + x = 180
y = 180 - x

y = x /2
180 - x = x/2
360 - 2x = x
3x = 360
x = 120°

y = 180 - x
y = 180 - 120
y = 60°

Answer 2

hey mate,
here's ur answer.

I hope this helps u.