Odpowiedzi

2009-12-15T16:10:19+01:00
{3x+4y =2/* (-5)
{5x + 7y =1/* 3
{-15x-20y= (-10)
{15x+21y=3
y= (-7)

{3x+4y =2/ * 7
{5x + 7y =1/* (-4)
{21x+28y=14
{-20x-28y= (-4)
x= 10

y= (-7)
x= 10