Question

exercitiul 2
dau 20 de puncte
multumesc

Answer 1

a:3=b:5=c:7=x => a=3x b=5x c=7x
(a+b+c):3=10
15x:3=10
5x=10
x=2 => a=6 b=10 c=14

Answer 2

{a,b,c} dp {3,5,7}
a/3 = b/5 = c/7 = k 
a = 3k 
b = 5k 
c = 7k 

(a + b + c) : 3 = 10 
(3k + 5k + 7k) : 3 = 10
15k : 3 = 10 
5k = 10 /:5
k = 2

a = 3k 
a = 6 

b = 5k
b = 10

c = 7k 
c = 14

/robertinni