Odpowiedzi

2009-12-17T20:29:22+01:00
A) {1/2x - 2y= 8 *(-4)
{2x + 5y= 6


{-2x + 8y= -32
+
{2x + 5y= 6
________________
13y= -26 :13
y= -2




{1/2x - 2y= 8 *5
{2x + 5y= 6 *2

{5/2x - 10y= 40
+
{4x + 10y=12
______________
13/2x=52 :13/2
x= 104/13=8