Răspuns :
(a+b+c):3=16
a+b+c=48
a/4=b/5=c/7=k
a=4k
b=5k
c=7k
4k+5k+7k=16k=48
k=3
a=12
b=15
c=21
a+b+c=48
a/4=b/5=c/7=k
a=4k
b=5k
c=7k
4k+5k+7k=16k=48
k=3
a=12
b=15
c=21
(a+b+c) / 3 = 13 => a+b+c = 3*16 = 48
a/4 = b/5 = c/7 = (a+b+c) / (4+5+7) = 48 / 16 = 3
inseamna ca: a = 4*3 = 12
b = 5*3 = 15 si
c = 7*3 = 21
a/4 = b/5 = c/7 = (a+b+c) / (4+5+7) = 48 / 16 = 3
inseamna ca: a = 4*3 = 12
b = 5*3 = 15 si
c = 7*3 = 21