Answer:
12,34
Explanation:
For 'a'
8x=(2x+72) [vertically opposite angle]
8x-2x=72
6x=72
x=72/6
x=12
For 'b'
4x+20+x-10=180° [ being straight angle ]
4x+x+20-10=180°
5x+10=180°
5x=180-10
x=170/5
x=34
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