Question

IMPARTITI NR 900 IN PARTI DIRECT PROPORTIONALE CU 3,5 SI RESPECTIV 7

Answer 1

a + b + c = 900

a , b , c d.p 3 , 5 , 7

a / 3 = b / 5 = c / 7 = k

a = 3k

b = 5k

c = 7k

15k = 900

k = 900 : 15

k = 60

a = 180

b = 300

c = 420

Answer 2

{ a,b,c } d.p { 3,5,7 } 
-----------------------/-----
a + b + c = 900
-----------------------//-----

a / 3 = b / 5 = c / 7 = K

a / 3 = K => a = 3 K
b / 5 = K => b = 5 K
c / 7 = K => c = 7 K

3 K + 5 K + 7 K = 900
8 K + 7 K = 900
15 K = 900
K = 900  : 15
K = 60

a = 60 x 3  = 180

b = 60 x 5 = 300

c = 60 x 7 = 420