Răspuns :
Răspuns:
1/2=n/4
2n=1·4=>n=4:2=>n=2
_______
6/n=18/15
18n=6·15=>n=90/18=>n=5
_______
40(n+1)=2n·22
40n+40=44n
40=44n-40n
4n=40=>n=40:4=>n=10
Răspuns:
1/2=n/4
2n=1·4=>n=4:2=>n=2
_______
6/n=18/15
18n=6·15=>n=90/18=>n=5
_______
40(n+1)=2n·22
40n+40=44n
40=44n-40n
4n=40=>n=40:4=>n=10