Question

find the value of x
please help me it's urgent​

Answer 1

Answer:

5x + 4x = 180° ( linear pair )

9x = 180°

x = 180 ÷ 9

x = 20°

5x = 20 x 5

x = 100°

4x = 20 x 4

x = 80°

5x = 100

4x =80

Answer 2

from figure,

5x+4x=180° [linear pair/Straight line]

9x=180°

x= 180÷9

x=20°

hence the angles are:

5x=5*20= 100°

4x=4*20= 80°

explanation= 4x and 5x are adjacent angles that form a linear pair( when 2 adjacent angles form angle of 180°,it is called linear pair).

Or you can also write the reason that it is a straight line. and we know that straight lines form angle of 180°.

hope it was useful for you ☺️