Răspunsuri

2014-04-08T11:14:42+03:00
A) y = -2x
x+6x=7
7x=7
x=1
y= -2
b) x= 2y/4
2y-4y=4
2y-4y=4
y= -2
x= -1
c)x= 3y-3/2
-3y+3+4y=10
y= 7
x=9
d) x= y-1/2
3y-3-4y=2
-y=5
y= -5
x= -3
/ = L-am pus ca SUPRA de la fractie
2014-04-08T11:59:37+03:00