Question

Ce valori pot lua x si y, stiind ca sunt numere de o cifra? 9x(x-y)+3(x-y)=12 si (x-y)x12=12

Answer 1

x=y+1
x=1,2,3,4,5,6,7,8,9
y=1,2,3,4,5,6,7,8

9(x-y)+3(x-y)=12
9(1-0)+3(1-0)=12
9x1+3x1=12

9(9-8)+3(9-8)=12


(x-y)x12=12
(2-1)x12=12
1x12=12
9x1+3x1=12