Răspuns :
x+y=12
x=0,2 *y
x=2/10*y
x=1/5*y
x=y/5
y/5 +y=12 aducem la acelasi numitor
y+5y=60
6y=60
y=10 x=10/5=2
x=0,2 *y
x=2/10*y
x=1/5*y
x=y/5
y/5 +y=12 aducem la acelasi numitor
y+5y=60
6y=60
y=10 x=10/5=2