Question

aflati3 numerenaturalestind ca sumalor este 48 si sunt direct poportiionale cu numerele 4,5,7

Answer 1

fie a,b,c numerele
⇒a/4=b/5=c/7=(a+b+c):(4+5+7)=48:16=3
⇒a=3x4=12
b=3x5=15
c=3x7=21

Answer 2

Fie x, y si z-nr.
{x, y, z}------->d.p {4, 5, 7}=>x/4=y/5=z/7=k
x/4=k=>x=4k
y/5=k=>y=5k
z/7=k=>z=7k
x+y+z=360
4k+5k+7k=48
16k=48
k=48/16
k=3=>
            x=12
            y=15
            z=21