Odpowiedzi

2010-03-23T21:57:39+01:00
X = y +3
z = 2y-2
x+y+z=17

y+3+y+2y-2=17
4y +1 = 17 /-1
4y = 16 /4
y = 4

x= y+3 => 4+3
x = 7

z = 2y-2 => 2*4-2
z = 8-2 => 6

Spr .
x+y+z= 17
7+4+6 = 17
17=17
L=P