Question

Determinati nr x,y,z direct proportionale cu nr 3,4,6 stiind ca :y+z-x=21
Va rog ajutatima dau 40 puncte

Answer 1

Notezi x=3n y=4n si z= 6n

10n-3n=21

7n=21

n=3

x=9

y=12

z=18

Answer 2

Răspuns:

x/3=y/4=z/6=k

x=3k

y=4k

z=6k

inlocuim x,y,z in relatia y+z-x=21

4k+6k-3k=21

7k=21=>k=21:7=>k=3

x=3·3=9

y=4·3=12

z=6·3=18