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Exerćıcios
Resolva os sistemas seguintes
a)
 2x +y −z −t = 3x −y +z +t = 33x +y −z −3t = 3
b)
 2x +y +z +t = 0x +y +2z +2t = 42x +3y +7z +7t = 6
c)

x −2y +3z = 21
2x −y +2z = 21
3x +y +2z = 14
4x +2y +z = 14
d)
 5x +3z = 16−2y +2z = 0x +5z = 12
e)
 2x +y −z = 3x −y +z = 33x +y −z = 3
f)
 2x +y −z = 10x −y +z = −43x +y −z = 12
g)
 2x +y +z = 0x +y +2z = 42x +3y +7z = 6
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