Răspuns :
Fie a,b cele doua numere necunoscute
a+b=72
a=3*b
a=3b
4b=72
b=72:4
b=18
a=18*3
a=54
Cele doua numere sunt 18,54
V: 18+54 = 72
a+b=72
a=3*b
a=3b
4b=72
b=72:4
b=18
a=18*3
a=54
Cele doua numere sunt 18,54
V: 18+54 = 72
x+y=72
x:y=3=>x=3y
3y+y=72=>4y=72=>y=18
x=3y=>x=3*18=>x=54
........................................
x:y=3=>x=3y
3y+y=72=>4y=72=>y=18
x=3y=>x=3*18=>x=54
........................................