题目内容

解方程.
(1)2x-8.125=18.125 
(2)3x+
13
9
=
14
9
(3)x+
5
9
=1
(4)2x-
5
6
=
5
6
(5)x-(
3
14
+
4
7
)=
1
2
(6)x-(
7
4
-
3
8
)=
7
8
.
(1)2x-8.125=18.125,
2x-8.125+8.125=18.125+8.125,
2x÷2=26.25÷2,
x=13.125;

(2)3x+
13
9
=
14
9
,
3x+
13
9
-
13
9
=
14
9
-
13
9
,
3x÷3=
1
9
÷3,
x=
1
27
;

(3)x+
5
9
=1,
x+
5
9
-
5
9
=1-
5
9
,
x=
4
9
;

(4)2x-
5
6
=
5
6
,
2x-
5
6
+
5
6
=
5
6
+
5
6
,
2x÷2=
10
6
÷2
,
x=
5
6
;

(5)x-(
3
14
+
4
7
)=
1
2
,
x-
11
14
=
1
2
,
x-
11
14
+
11
14
=
1
2
+
11
14
,
x=1
2
7
;

(6)x-(
7
4
-
3
8
)=
7
8
,
x-
11
8
=
7
8
,
x-
11
8
+
11
8
=
7
8
+
11
8
,
x=2
1
4
.
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