Question

calcule os valores de cada x,y e z no sistema

x+2y+z=8.
2x-y+z=3.
3x+y-z=2

Answer 1

|x+2y+z = 8
|2x-y+z = 3
|3x+y-z = 2

|2x-y+z = 3 +
|3x+y-z = 2

5x = 5
x = 5/5
x = 1

|x+2y+z = 8 (-1)
|2x-y+z = 3

|-x-2y-z = -8 +
|2x-y+z = 3

x-3y = -5
1-3y = -5
-3y = -5-1
-3y = -6
y = -6/-3
y = 2

x+2y+z = 8
1+2.2+z = 8
1+4+z = 8
5+z = 8
z = 8-5
z = 3

S = {1,2,3}