Odpowiedzi

2010-03-25T15:03:59+01:00
-3x+y=-5
x+y=1
y=-5+3x
x+-5+3x=1
4x=6
x=6/4=1,5
1,5+y=1
y=1-1,5=-0,5
1 1 1
2010-03-25T15:04:09+01:00
-3x+y=-5
x+y=1 I-y

-3x+y=-5
x=1-y

-3(1-y) +y=-5
x=1-y

-3+3y+y=-5
x=1-y

-3+4y=-5 I+3
x=1-y

4y=-2 I:4
x=1-y

y=1/2
x=1-1/2

y=1/2
x=1/2