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rezolvati in multimea R ecuatia;2z-4=8-z
-2x=3(x-5)+6


Răspuns :

2z-4=8-z
2z+z=8+4
3z=12
z=12/3=4

-2x=3(x-5)+6
-2x=3x-15+6
-2x-3x=-9
-5x=-9
x=-9/(-5)=9/5
Spor la lucru!