Odpowiedzi

2009-11-30T13:49:57+01:00
2009-11-30T13:49:49+01:00
-3x+1-x-=-5
-4x=-6
x=1.5
więc -1,5+-0,5=-1
-0,5 = y
2009-11-30T13:53:07+01:00
-3x + y = -5
-x -y = -1
-x = y - 1
x = 1 - y
- 3(1 - y) + y = - 5
- 3 + 3y + y = - 5
4y = - 5 + 3
4y = - 2
y = - 1/2
- x - y = - 1
- x + 1/2 = - 1
- x = - 1 - 1/2
x = 1 i 1/2
odp
x = 1 i 1/2
y = - 1/2