Question

найдите неизвестный член пропорции
2 : х = 1,5 :6,75

Answer 1

$<var>\frac{2}{x}=\frac{1.5}{6.75}\\ 1.5x=2*6.75\\ x=\frac{2*6.75}{1.5}=9</var>$

Answer 2

2*6.75=x*1.5

13.5=x*1.5

x=13.5/1.5

x=9