Răspunsuri

2014-05-13T20:08:52+03:00
A+b+c=90
b+c/2=a =>(rezulta) 2a=b+c
c=a/3
a+2a=90
a=30
c=10
b=90-40=50

1 5 1
2014-05-13T20:09:11+03:00
X+y+z=90
x=(y+z)/2
z=1/3 *y
z=y/3

x=(y+y/3)/2  aducem la acelasi numitor in paranteza
x=(3y+y)/3/2
x=4y/3/2
x=4y/3 *1/2
x=2y/3

2y/3 +y +y/3=90   aducem la acelasi numitor
2y+3y+y=180
6y=180
y=30
x=30/3=10
x=2*30/3= 2*10=20