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Descopera numerele x si y ,daca 417-7*x=yyy,iar y<4

Răspuns :

YYY=111,222 SAU 333
417-111=306/ 306:7=43.7 GRESIT
417-222=195/195:7=27.85 GRESIT

417-333=84
84:7=12
417-7X12=84
X=12
Y=3