Odpowiedzi

2009-12-11T19:55:39+01:00
{0,25x+0,40y=1260 / *100
{x+y=4050

{25x+40y=126000
{x+y=4050

x+y=4050
x=4050-y




25(4050-y)+40y=126000
101250-25y+40y=126000
-25y+40y=126000-101250
15y=24750 /:15
y=1650


x=4050-1650
x=2400

{x=2400
{y=1650
1 5 1
2009-12-11T20:09:17+01:00
{0,25x+0,4y=1260//*(-2)
{x+y=4050
{-x+(-0,8)=-2520
+{ x+y=4050
= 0,2y=1530// \0,2
y=306