Odpowiedzi

2009-12-18T14:57:35+01:00
{(2x-10=4(y+1)
{ 2(x-3)-9=1-y

2x-10=4y+4
2x-6-9 = 1-y

2x-4y=14 /*(-1)
2x +y = 16
<metoda przeciwnych wspolczynnikow>

-2x +4y = -14
2x +y =16

5y = 2 / :5
y = 2/5

y=2/5
2x+ 2/5 = 16

y = 2/5
2x = 15 i 3/5 / :2

y = 2/5
x = 7 i 4/5

:)





2009-12-18T14:59:19+01:00
{2x-10=4y+4
{2x-6-9=1-y
{2x-4y=4+10
{2x+y=1+6+9
{2x-4y=14
{2x+y=16 |x4
{2x-4y=14
{8x+4y=64
10x=78
x=7,8



2*7,8-4y=14
15,6-4y=14
-4y=14-15,6
-4y=-1,6 |:(-4)
y=0,4