Odpowiedzi

2009-11-30T14:07:48+01:00
0,5x-1,5-y=-3
x/3-y/2=1/3 / *6

0,5x -1,5+3=y
2x-3y=2

2x-1,5x-4,5+9=2
0.5x=-2,5 /0.5
x=-5
y=-4
2009-11-30T14:08:06+01:00
0,5x-1,5-y=-3
0,5x=-3-1,5-y
0,5x=-4,5-y
x=-9-2y

-y=-3+1,5-0,5x
-y=-1,5-0,5x /*1
y=1,5-0,5x


2x-1,5x-4,5+9=2
0.5x=-2,5 /0.5
x=-5
y=-4