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2x - 4y = 8
4x -8 - y = 1
2x - 4y = 8
4x - y = 1 + 8
2x - 4y = 8 /* (-2)
4x - y = 9
-4x + 8y = -16
------------------
7y = -7 /:7
y = -1
2x - 4 (-1) = 8
2x + 4 = 8
2x = 8 - 4
2x = 4 /"2
x = 2
x = 2
y = -1
spr.
4(2 - 2) - (-1) = 1
2 *2 -4(-1) = 8
4 * 0 + 1 = 1
4 + 4 = 8
0 + 1 = 1
8 = 8
1 = 1
8 = 8
(metoda przeciwnych wspolczynnikow)
2x-4y=8
4x-y=1+8
2x-4y=8
4x-y=9
2x-4y=8
-y=9-4x
4x-(9-4x)=9
4x-9+4x=9
8x-9=9
8x=9+9
8x=18
x=
-y=9-4x
-y=9-4*
-y=9-
-y=
-y= /*(-1)
y=-
-y=9-4x
=9-4*
=9-
= -
=
L=P