5-
|
(1)5-
X=0.6,1 5
5-
X+1 5
X=0.6+1 5
X,1 5
0.6+
X=5,1 5
0.6+
X-0.6=5-0.6,1 5
X=4.4,1 5
X=22;
(2)X:4
=4.5:2,4 9
2X=4
×4.5,4 9
2X=20,
2X÷2=20÷2,
X=10;
(3)1.2X-0.5X=1.2×
,1 4
0.7X=1.2×
,1 4
0.7X=0.3,
0.7X÷0.7=0.3÷0.7,
X=
.3 7
5-
|
(1)5-
X=0.6,1 5
5-
X+1 5
X=0.6+1 5
X,1 5
0.6+
X=5,1 5
0.6+
X-0.6=5-0.6,1 5
X=4.4,1 5
X=22;
(2)X:4
=4.5:2,4 9
2X=4
×4.5,4 9
2X=20,
2X÷2=20÷2,
X=10;
(3)1.2X-0.5X=1.2×
,1 4
0.7X=1.2×
,1 4
0.7X=0.3,
0.7X÷0.7=0.3÷0.7,
X=
.3 7