Odpowiedzi

2009-09-22T16:51:11+02:00
X+y+z=12 => x + y = 12 - z
x+y-z=2 => x + y = 2 + z
x-y+z=4

12 - z = 2 + z
2z = 10
z = 5

x+y = 12 - z = 7
x-y= 4 - z = -1 => y = x+1

x + x + 1 = 7
2x = 6
x = 3

y = x+1 = 4

z = 5
x = 3
y = 4