Question

Найдите неизвестный член пропорции х:5=21:15 12/x=8/18 4,5:0,6=x:2,4 3,4/5,1=1,4/x

Answer 1

X/5=21/15
x=5*21/15
x=7
12/x=8/18
x=12*18/8
x=27
4.5/0.6=x/2.4
x=4.5*2.4/0.6
x=18
3.4/5.1=1.4/x
x=5.1*1.4/3.4
x=2.1