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-x+56=6x
42-x=-7x
-x-27=2x


Răspuns :

Răspuns:

-x+56=6x

-x -6x=-56

-7x= -56

x=8

42-x= -7x

-x + 7x=-42

6x= -42

x =-7

-x-27=2x

-x -2x=27

-3x=27

x =-9