Question

sfertul unui numar este cu 10 mai mare decat treimea altui numar . impreuna cele doua numere au suma 89 . afla care sunt cele doua numere .

Answer 1

x,y-nr necunoscute
(x:4)+10=y:3
X+y=89=>y=89-x Si inlocuiesti
(x:4)+10=(89-x) :3 , Aduci la acelas numitor eliminand astfel bazele . si calculezei

Answer 2

a/4=b/3+10           a+b=89   =>  a=89-b

3a/12=4b/12+120/12   =>  3a=4b+120

3(89-b)=4b+120   =>  267-3b=4b+10  => 267-120=4b+3b   =>  7b=147  =>  b=21

a=89-21=68           

                           a=68   si   b=21

                                  Verificare:                                                    

68/4=21/3+10        17=7+10   Corect!!!