Răspuns :
xy + yx = 33
(descompunem in baza 10)
10×x + y + 10×y + x = 33
11×x + 11×y = 33
(dam factor comun pe 11)
11 × (x + y) = 33
x + y = 33 : 11
x + y = 3
(descompunem in baza 10)
10×x + y + 10×y + x = 33
11×x + 11×y = 33
(dam factor comun pe 11)
11 × (x + y) = 33
x + y = 33 : 11
x + y = 3
10x + y + 10y + x = 33
11x + 11y = 33
11(x + y) = 33
x + y = 33 : 11
x + y = 3
11x + 11y = 33
11(x + y) = 33
x + y = 33 : 11
x + y = 3