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paranteza patrata 5x(5x-5)-120paranteza patrata x5-25=125 va rog rezolvati.


Răspuns :

(25x-25-120)*5-25=125
125x-125-600-25=125
125x=875
x=875/125
x=7
[tex] \left \{ {{y=2} \atop {x=2}} \right. [/tex]