(1)X:14=6:28,
28X=14×6,
28X=84,
x=3;
(2)
=0.75 x
,0.25 3
0.25x=0.75×3,
0.25x=2.25,
x=9;
(3)
:3 8
=x:1 3
,1 6
x=1 3
×6,3 8
x=1 3
,9 4
x=
;27 4
(4)0.5:0.25=x:6,
0.25x=0.5×6,
0.25x=3,
x=12;
(5)
=x 0.08
,2 0.4
0.4x=2×0.08,
0.4x=0.16,
x=0.4;
(6)
:x=4:12,1 3
4x=
×12,1 3
4x=4,
x=1.