Question

найдите "Х" в пропорциях:

Answer 1

$\frac{6}{7}= \frac{10x}{21}$
$10x= \frac{21*6}{7}$
$10x=18$
$x=1,8$

$\frac{8}{9}= \frac{4x}{27}$
$4x= \frac{27*8}{9}$
$4x=24$
$x=6$

$\frac{27}{5x}= \frac{9}{16}$
$5x= \frac{27*16}{9}$
$5x=48$
$x=9,6$