Odpowiedzi

2009-12-11T17:12:21+01:00
{5p-2r=21 /*3
{3p+5r=-6 /*(-5)

15p - 6r = 63
-15p - 25r = 30
------------------------
-31r = 93 /: (-31)
r = -3
r = -3
5p -2r=21

r = -3
5p - 2*(-3) = 21

r = -3
5p + 6 = 21

r = -3
5p = 15 /:5

r = -3
p = 3
1 5 1
2009-12-11T17:14:26+01:00
{5p-2r=21 |* 5
{3p+5r=-6 |*2

{25p-10r=105
{15p+10r=-12

{10p=117 /10
{15p+10r=-12

{p=11,7
{15*11,7+10r=-12

{p=11,7
{175,5+10r=-12

{p=11,7
{10r=-12-175,5

{p=11,7
{10r=-197,5 /10

{p=11,7
{r=-19,75




1 1 1