Analisando o sistema
3x-2y+z=7
x+y-z=0
2x+y-2z=-1
a) S.P.D com xyz=7
b) S.P.D com xyz=8
c) S.P.D com xyz=6
d) S.P.I
e) S.I
3x-2y+z=7
x+y-z=0
2x+y-2z=-1
a) S.P.D com xyz=7
b) S.P.D com xyz=8
c) S.P.D com xyz=6
d) S.P.I
e) S.I
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Verified answer
3x -2y +z = 7x + y -z = 0
2x +y -2z = -1
> x = z - y
> 2x +y -2z = -1
2(z - y) + y - 2z = -1
2z - 2y + y - 2z = -1
-y = -1
y = 1
>3x -2y +z = 7
3(z - 1) -2.1 +z = 7
3z - 3 - 2 + z = 7
4z = 12
z = 3
> x = z - y
x = 3 - 1
x = 2
letra C
x.y.z = 6
2 .1.3 = 6