(1)40%X+60%=5,
40%X+60%-60%=5-60%,
40%x÷40%=4.4÷40%,
x=11;
(2)(1+
)X=5 6
,11 20
x=11 6
,11 20
x÷11 6
=11 6
÷11 20
,11 6
x=0.3;
(3)5X-3×
=7 10
,7 5
5x-
=21 10
,7 5
5x-
+21 10
=21 10
+7 5
,21 10
5x÷5=
÷5,35 10
x=0.7;
(4)4:x=
,1 2
x=4,1 2
x÷1 2
=4÷1 2
,1 2
x=8.