Question

Resolva e classifique o sistema {x + y + z = 2 y + z = -1 - 2z = 8 agora marque a alternativa correta Escolha uma: a. b. c. d. e.

Answer 1

x+y+z=2
y+z=-1
-2z=8

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z=-4

x+y-4=2
y-4=-1
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x+y=2+4
y=-1+4
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x+y=6
y=3
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x+3=6
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x=3
y=3
z=-4