Răspuns :
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
(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
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!!!