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Daca 12-(5+x-2) = -2 atunci X este......
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Răspuns :

12-(5+x-2)=-2
5+x-2=12-(-2)=14
3+x=14
x=11
[tex]12-(5+x-2)=-2 \\ 12-(3+x)=-2 \\ 12-3-x=-2 \\ -x=-2-12+3 \\ -x=-11 \\ x=11[/tex]