Question

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

Answer 1

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

(X-Y)x12=12
1-0x12=12
1x12=12