Question

an angle is 2 upon 3 of its supplement what is its magnitude

Answer 1

let one angle be X then another angle Willbe 2/3 of X therefore

x+2x/3=180

5x=540
x=108 therefore another angle Will be 72

Answer 2

$\huge \mathfrak{Answer:-}$

Let one angle is x then its supplementary angle is 2x/3

x + 2x/3 = 180

5x/3 = 180

x = 108

supplementary angle is 2*108/3 = 72