Odpowiedzi

2010-04-07T21:54:37+02:00
/-kreska ułamkowa

x/5 - y/4 =0 /*20
x/2 - y/16 = 5,5 /*16

4x-5y=0 /*(-2)
8x-y=88

-8x+10y=0
8x-y=88
_________
9y=88
y=88/9
x=110
2010-04-07T22:11:05+02:00
X/5 - y/4 =0 / *20
x/2 - y/16 = 5,5 / *16

4x-5y=0 / *(-2)
8x-y=88

-8x+10y=0
8x-y=88

9y=88 /:9
y=88