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Aflaxi X di ecuatia:
5X-4=2X+18 , X apartine numerelor intregi


Răspuns :

5x -  2x = 18 +4
3x = 22  
x = 22/3 = 7,(3) ∈ Q
ecuatia nu are solutie in Z
5x-4=2x+18
5x-2x=18+4
3x=22
x=22/3
x=7,(3)