Odpowiedzi

2009-11-23T15:44:04+01:00
1.1,5x+y=6
y=6-1,5x-odp
3/2x=6-y/*2/3
x=4-2/3y-odp
2.-3y=2/:(-3)
y=-2/3-odp
3.3+3x=6y
3x=6y-3/:3
x=2y-1-odp
6y=3+3x/:6
y=1/2+1/2x-odp
4.2(x-1)+2(y+1)=y
2x-2+2y+2=y
2x=y-2y
2x=-y/:2
x=-1/2y-odp
2x=-y/:(-1)
y=-2x-odp


2009-11-23T15:49:39+01:00
1.y=7,5x
2.y=5
3.xy=0
4.2x-2+2y+1=y
2x+y=0