Odpowiedzi

2010-02-04T16:49:37+01:00
X+y+4=0
3x+4y+6=0

x=-4-y
3(-4-y)+4y+6=0

x=-4-y
-12-3y+4y+6=0

x=-4-y
-6=-y/ (-1)

x=-4-y
y=6

x=-4-6=-10

y=6
x=-10
1 5 1
2010-02-04T16:49:59+01:00
X+y+4=0
3x+4y+6=0

x+ y= -4 /*(-3)
3x+ 4y= -6

-3x -3y= 12
3x+ 4y= -6

y=6

y=6
x+ y = -4

y=6
x+6 =-4

y=6
x=-10