Solve the following system of equations ...

Solve the following system of equations `3x - 4y + 5z = 0, x + y - 2z = 0, 2x + 3y + z = 0`

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D=`[[3,-4,5],[1,1,-2],[2,3,1]]`
=`3(1-(-6)+4(5)+5*1`
=46.
`D!=0`
`D_x=D_y=D_z=0`
`x=D_x/D=0,y=0,z=0`
`(x,y,z)=(0,0,0)`.

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