Odpowiedzi

2010-02-16T21:12:05+01:00
Zad 1.
{5x-y=21
{y-2x=-3

{5x-y=21
{-2x+y=-3
+_________

3x=18
x=6

y=21-5x
y=21-30
y=-9
x=6
1 5 1