October 2018 1 15 Report

Proszę pomóżcie mi rozwiązać:

(to są układy równań, więc z boku jest klamra jak coś)

a) x+2y-z=-4

2y+z=2

2y=-2

b) x-2y-z=-9

2y+3z=16

3y-z=2

c) x+2y-z=8

2x+2y-z=10

2x+3y+z=5

d) x-y-2z=-5

x+2y+z=4

x-3y-2z=-3


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