Răspunsuri

2014-02-25T21:30:13+02:00
Fie x si y cele 2 numere.
(1) 5x = y
(2) 3y = y+240 (nr.initial considerand ca e "tot el") => 2y = 240 => y=120
(1) 5x=120 => x=24
x+y = 24+120 = 144

SAU
(1) 5x = y
(2) 3y = x+240 (nr.initial considerand ca e "celalalt") => (inlocuiesc y cu 5x) 3 . 5. x = x+240 => 15x-x=240 => 14x = 240 => x=240/14=120/7
(1) 5x=y => y=120/7 .5 = 600/7
x+y = 120/7 + 600/7 = 720/7