plz help me to solve this problem
class 9 lines and angles
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x+100=180( co.int.angles)
x=180-100=80 degree
y+30+20=180(straight line)
y=180-50=130 degree
therefore
(y+x):(y-x)
130+80:130-80
210:50
21:5
x=180-100=80 degree
y+30+20=180(straight line)
y=180-50=130 degree
therefore
(y+x):(y-x)
130+80:130-80
210:50
21:5
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