Odpowiedzi

2010-03-22T21:09:03+01:00
X+y= -3
3x -2y= -4

x= -3-y
3(-3-y) - 2y= -4

x=-3-y
-9-3y-2y=-4

x=-3-y
-5y=5 / (-5)

x=-3-(-1)
y= -1

x=-2
y=-1

2010-03-22T21:14:10+01:00
X+y=-3
3x-2y=-4 /:2

x+y=-3
1,5x-y=-2

2,5x=-5/:2,5
x=-2

-2+y=-3
x=-2

y=-1
x=-2