Odpowiedzi

2010-03-14T12:38:42+01:00
1-(y-2)=2(x+1)
x-y=2

1-y+2=2x+2
x-y=2

2x+y=1
x-y=2

3x=3
x=1

1-y=2
y=-1
2010-03-14T12:43:26+01:00
1-(y-2)=2x+2
x-y=2

1-y+2=2x+2
x=2+y

3-y=2x+2
x=2+y

3-y=2*(2+y)+2
x=2+y

3-y=4+2y+2 /-3
x=2+y

-y=6-2y-3 /-2y
x=2+y

-3y=3
x=2+y

y=-1
x=2-1=1