Răspuns :
x-y=824
x=5y
5y-y=824
4y=824
y=824/4
y=206
x-206=824
x=824+206
x=1030
Verificare:1030-206=824
x=5y
5y-y=824
4y=824
y=824/4
y=206
x-206=824
x=824+206
x=1030
Verificare:1030-206=824