Question

Sa se afle 3 numere cu suma 900 si direct proportionale cu 5,10 si 3.. Repede pls

Answer 1

a/5=K => a=5k
b/10=K => b=10k
c/3=K =>c=3k
5k+10k+ 3k=900
18k=900
K=50
A=5*50
A=250
B=500
C=150

Answer 2

x = 5k
y = 10k
z = 3k 

5k + 10k + 3k = 900
18 k = 900 
k = 900 : 18 
k = 50 

x = 5 x 50 = 250 
y = 10 x 50 = 500
z = 3 x 50 = 150

250 + 500 + 150 = 900