Question

determinati nr x,y,z si t direct proporționale cu 4,5,6,7 stiind ca t+z-y-x=28​

Answer 1

Răspuns:

x/4=y/5=z/6=t/7=k

x=4k

y=5k

z=6k

t=7k

t+z-y-x=28

7k+6k-5k-4k=28

4k=28=>k=28:4=>k=7

x=4·7=>x=28

y=5·7=>y=35

z=6·7=>z=42

t=7·7=>t=49

verificare: t+z-y-x=49+42-35-28=28