Odpowiedzi

2010-01-19T18:15:10+01:00
X+2y=5 II:(-1)
x+y=2

-x-2y=-5
x+y=2
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-y = -3
y=3

*x+y=2
x=-1
2010-01-19T18:15:34+01:00
X+2y=5
x+y=2

x = 5 - 2y
x + y = 2

x = 5 - 2y
5 - 2y + y = 2

x = 5 - 2y
y = 3

x = 5 - 6
y = 3

x = -1
y = 3
2010-01-19T18:16:03+01:00
{x+2y=5
{x+y=2

{x+2y=5
{x=2-y

{2-y+2y=5
{x=2-y

{y=3
{x=2-3=-1