Question

Fiind data proporția 3/a=b/9 aflați raportul a•b/a•b+3

Answer 1

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

$ab = 3 \times 9$

$ab = 27$

$\frac{ab}{ab + 3} = \frac{27}{27 + 3} = \frac{27}{30} = \frac{9}{10}$

Answer 2

3/a=b/9⇒a·b=3·9⇒a·b=27
a·b/a·b+3=27/27+3⇒27/30⇒9/10
Sper ca te-am ajutat!