Question

Aflati 2 numere stiind ca au suma 12 si diferenta 2.

Answer 1

Salut!

Fie a si b cele doua numere

a+b=12

a-b=2⇒a=b+2

Inlocuim in prima ecuatie:

a+b=12

b+2+b=12

2b+2=12

2b=12-2

2b=10

b=10:2

b=5

Acum aflam nr. "a"

a+b=12

a+5=12

a=12-5

a=7

Verificare:

1) a+b=12

7+5=12

12=12 (A)

2) a-b=2

7-5=2

2=2 (A)

Succes!