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inpartim numarul 7200 in parti direct proportionale cu 25 si 75


Răspuns :

x/25, y/75 = k ; x+y=7200 ; x=25k ; y = 75k .. 25k+75k=7200 =100k=7200 |: 100 ;k=72 ; x= 25*72=1800 , y= 75*72 = 5400