Question

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

Answer 1

9x(2-1)+3(2-1) si (2-1) egal 12

Answer 2

a∈{1,2,...,9} si b∈{0,1...,8}