Plz answer the 1st question
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given 2x-3y=60
and also x+y=180. linear pair
2x=60+3y
x=60+3y/2
now
(60+3y/2)+y=180
60+3y/2=180-y
60+3y=2(180-y)
60+3y=360-2y
5y=360-60
5y=300
y=60°
x=180-(60)
x=120°
and also x+y=180. linear pair
2x=60+3y
x=60+3y/2
now
(60+3y/2)+y=180
60+3y/2=180-y
60+3y=2(180-y)
60+3y=360-2y
5y=360-60
5y=300
y=60°
x=180-(60)
x=120°
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