Question

Answer of 4th question

Answer 1

(7x+20)+3x=180°....... ( angles in linear pair)
10x+20=180
10x=180-20
10x=160
x=160\10
x=16°
and that is your answer

Answer 2

angle AOC + angle BOC =180° (linear pair )
(7x + 20 )° + (3x)° = 180°
10x + 20 = 180°
10x = 180° -20 °
x = 160° ÷ 10
x = 16 °
hope it will help uh...
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