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2010-01-10T21:25:06+01:00
{x+2y=-2
{2x-y=1
3x+y=-1
y=3x-1
2x-3x-1=-2
-x=-1
x=1
2010-01-10T21:28:29+01:00
{x=-2-2y
{2(-2-2y)-y=1
{x=-2-2y
{-4-4y-y=1
{x=-2-2y
{-5y=5 /:-5
{x=-2-2y
{y=-1
{x=-2-(-2)=0
{y=-1
to tyle proszę o naj
2010-01-10T21:31:19+01:00
{x+2y=-2
{2x-y=1

{x=-2-2y
{2*(-2-2y)-y=1
-4-4y-y=1
-5y=5
y=-1

x-2=-2
x=0

{x=0
{y=-1