Question

The supplement of an angle is 30°less than double of the angle find the angle

Answer 1

Step-by-step explanation:

let the angle be x

and other angle be 2x-30

A.T.Q.

$x + 2x - 30 = 180 \\ 3x - 30 = 180 \\ 3(x - 10) = 180 \\ x - 10 = 180 \div 3 \\ x - 10 = 60 \\ x = 60 + 10 \\ x = 70$

$x = 70$

Therefore, angle is 70 degree