Answer:
x = 20
Step-by-step explanation:
These angles are same-side supplementary, therefore they add up to 180°.
[tex]4x + 5x = 180 \\ 9x = 180 \\ x = 20[/tex]
4x + 5x = 180
because of interior angle
hence, 9x = 180
x = 180/9
one angle = 20*4 = 80
another angle = 20*5 = 100
hope it helps
