If x + y + z = 0, then what is the value of (3$y^{2}$ + $x^{2}$ + $z^{2}$)/(2$y^{2}$ – xz)?

If x + y + z = 0, then what is the value of (3$y^{2}$ + $x^{2}$ + $z^{2}$)/(2$y^{2}$ – xz)?
1). 2
2). 1
3). 5
4). 7

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