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rezolvati ecuatia 2x +y-z=2

Răspuns :

2x+y-z = 2

x:   2x = 2-y+z => x = (-y+z+2)/2
y:   y = -2x+z+2
z:   -z = -2x-y+2 => z = 2x+y-2

O solutie:

x=1; y=0;z=0