Question

ab cu bara deasupra - ba cu bara deasupra = a(b-1) , a diferit de b, determinati ab cu bara deasupra. Cum fac?

Answer 1

10a+b-10b+a=a(b-1)⇒11a-9b=ab-a⇒12a=ab+9b a ≠ b a≠0 a=1⇒12=b+9b⇒12=10 b,nu verifica a=2⇒24=2b+9b⇒24=11 b,nu verifica a=3⇒36=3b+9b⇒36=12b⇒b=3,nu verifica deoarece a≠b ......................................................................................................................................................................... a=9⇒108=18b⇒b=6 Deci a=9 si b=8