Question

.. 6:- In the given fig. adjacent angles are complementary. Find the value of x.
B
A
3x+20
X
D​

Answer 1

Step-by-step explanation:

3x+20+x= 180 degree (Linear pair)

4x+20=180 degree

x=160/4=40 degree

therefore substitute x:

3x+20 = 3(40)+20= 140 degree

and x=40 degree

Answer 2

Step-by-step explanation:

the angle of a line is 180°

so 3x+20+x=180

4x=160

x=40