Răspunsuri

2014-11-08T20:40:06+02:00
X+y=180 grade
2x=3y⇒   x=3y/2 inlocuim in I relatie
3y/2+y=180
(3y+2y)/2=180
5y/2=180
5y=180·2
y=360/5
y=72 grade
x=3y/2=3·72/2
x=108 grade 
108+72=180 grade