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Z=-25/4
X=31/20
Esa es la respuesta. :)
y=0
3y-4z=25
3(0)-4z=25
0-4z=25
-25=4z
-5=z
-5x+z=-14
-5x-5=-14
-5x=-14+5
-5x=-9
9=5x
1,8=x