Question

daca 4a pe 7 = 8 pe 14b atunci a ori b =

Answer 1

$\frac{4a}{7}= \frac{8}{14b}$
 
produsul mezilor=produsul extremelor

$\ \\ 4a*14b=7*8 \\ \\ 56a*b=56 \\ \\ a*b=56:56 \\ \\ a*b=1$

Answer 2

4a/7=8/14b
ab=?
4ax14b=7x8⇒56ab=56⇒ab=56/56⇒ab=1
succes