Odpowiedzi

2009-12-16T17:00:33+01:00
Y+2-(3-x)=0
x-2=5-(2-y)

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

x+y=-1
x-y=5

2x=4
x=2

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

y=-3
x=2
2009-12-16T17:02:37+01:00
Y+2-(3-x)=0
x-2=5-(2-y )

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

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

y +x = 1
x -y = 5

x = 1 -y
1 -y -y = 5

x = 1 -y
-2y = 5 -1

x = 1-y
-2y = 4

x = 1 - y
y = 4 : (-2)

x = 1 -y
y = -2

x = 1 -(-2) = 1 +2 = 3
y = -2

x = 3
y = -2