Question

55 DE PUNCTE!!!

$\frac{3}{a} = \frac{b}{9}$

Aflați raportul : $\frac{a \times \: b}{a \times b + 3}$

Answer 1

ai Pb in imagine.....

Answer 2

**inmultesti pe diagonala
$\frac{3}{a} = \frac{b}{9}$
$a \times b = 9 \times 3$
$a \times b = 27$
$\frac{a \times b}{a \times b + 3}$
**inlocuiesti a×b cu 27
$\frac{27}{27 + 3} = \frac{27}{30}$
**se simplifica fractia prin 3
$= \frac{9}{10}$