Goi 3 so can tim la a,b,c
a, Ta co a/2 = b/3 = c/5 va a+b+c = 310
Ap dung tinh chat day ti so bang nhau ta co
a/2=b/3=c/5 = a+b+c = 310/10 = 31
2+3+5
⇒ a= 62,b = 93,c = 155
Vay 3 phan do lan luot la 62,93,155
b, Ta co ; 2a = 3b = 5c ⇒ 2a/30 = 3b/30 = 5c/30⇒ a/15 = b/10 = c/6 va a+b+c = 310
Ap dung tinh chat day ti so bang nhau ta co
a/15 = b/10 = c/6 = a+b+c = 310/31 = 10
15+10+6
⇒ a=150 , b=100,c=60
Vay 3 phan do lan luot la 150 ,100 ,60
