Odpowiedzi

2009-05-10T20:02:55+02:00
X+y=6
2x-2y=16/:2

x+y=6

x-y=8

2x=14/:2

x=7

2×7+2y=12

2y=-2/÷2

y=-1

2009-05-10T20:04:06+02:00
X+y=6/×2
2x-2y=16

2x+2y=12
2x-2y=16

4x=28/÷4
x= 7
2×7+2y=12
2y=-2/÷2
y=-1
2009-05-10T20:04:33+02:00
X= 6 -y

12- 2y - 2y = 16
-4y= 4
y= -1

x= 6 - y
x= 6 - -1
x= 7