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x+5=-4
x-1=-4
x-6=-2
5=-4+x
-3=-1+x


Răspuns :

x+5=-4

x=-4-5

x=-9

x-1=-4

x=-4+1

x=-3

x-6=-2

x=-2+6

x=4

5=-4+x

x=-4-5

x=-9

-3=-1+x

x=-1-3

x=-4

Bafta+