Two questions

[email1018]

Please, help me solve in Scilab

Question one:

x^2-3y^2=1
4x^2+3y^2=19

and separately,

3x+2y+z=4
2x-3y-z=5
when x equals any real number.

Question two:
[(x-2)/(x-4)]>[(x+2)/x]

Regards
Vinicius

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