Question

Determina cifrele x si y astfel incat: 7x=y8 xx=y2 5y7< 50x 2xy> 289 72x398 < 724y28

Answer 1

7x=y8 ⇒x = 8, y = 7

xx=y2 ⇒x=2, y=2; x=4, y =8;

5y7< 50x ⇒y=0 si x=8 si 9

2xy> 289 ⇒x=9 si y =0,1, 2,3,4,5,6,7,8,9

72x398 < 724y28 ⇒x= 4, si y= 4, 5, 6,7, 8, 9

x= 3 si  y = 0,1,2,3,4,5,6,7,8,9

x= 2 si  y = 0,1,2,3,4,5,6,7,8,9

x= 1 si  y = 0,1,2,3,4,5,6,7,8,9

x= 0 si  y = 0,1,2,3,4,5,6,7,8,9