Odpowiedzi

2009-12-11T09:42:36+01:00
X+2y=11
5x-3y=3

x=11-2y
5(11-2y)-3y=3

x=11-2y
55-10y-3y=3

x=11-2y
-13y=-52 / :-13

x=11-2y
y=4

x=3
y=4
2009-12-11T09:46:57+01:00
{ x + 2y = 11
{ 5x - 3y = 3

{x = 11 - 2y
{5 ( 11 - 2y) - 3y = 3

{x = 11 - 2y
{55 - 10y - 3y = 3

{x = 11 - 2y
{-13y = 3 - 55

{x = 11 - 2y
{-13 y = -52 |(-13)

{x = 11 - 2y
{y = 4

{x = 11 - 2*4
{y = 4

{x = 11 - 8
{y = 4

{x = 3
{y = 4
1 5 1