x=primul numar
y=al doilea numar
x=80+y
(x+y)/(x-y)=50 rest 10
Inlocuim numarul x in ecuatie si avem:
[(80+y)+y]/[(80+y)-y]=50 rest 10
Desfacem parantezele rotunde:
(80+y+y)/(80+y-y)=50 rest 10
(80+2y)/80=50 rest 10
80+2y=50*80+10
80+2y=4010
2y=3930
y=1965
x=1965+80=2045
Verificare: (2045+1965):(2045-1965)=4010:80=50 rest 10
