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Urgent!
Stiind ca xy + xz + 5x= 485 si y+z= 92, determinati x.


Răspuns :

[tex]xy + xz + 5x= 485 \\ y+z= 92 \\ x(y+z+5)=485 \\ x(92+5)=485 \\ 97x=485 \\ x=485:97 \\ x=5[/tex]