Question 1

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Resol el sistema d'equacions següent:
open curly brackets table row cell begin straight style negative 5 times x plus y minus 4 times z end style equals begin straight style negative 74 end style end cell row cell begin straight style 4 times x minus 4 times y minus 2 times z end style equals begin straight style 8 end style end cell row cell begin straight style 4 times x minus 4 times y minus 5 times z end style equals begin straight style negative 16 end style end cell end table close


x=
y=
z=
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