Question

impartiti numarul 400 in parti direct proportionale cu numerele 5,8,7
impartiti numarul 800......................................................cu numerele 4,15,12
impartiti numarul 500....................................................cu numerele
(punctele inseamna in parti direct proportionale nu am mai stat sa scriu)

Answer 1

x/5=y/8=z/7=k
x=5k
y=8k
z=7k
5k+8k+7k=400
20k=400 =>k=20
=>x=100
=>y=160
=>z=140

x/4=y/15=z/12=k
x=4k
y=15k
z=12k
4k+15k+12k=800
31k=800 =>k=800/31  (CRED CA E GRESIT !)
=>x=3200/31
=>y=12000/31
=>z=9600/31