七上解一元一次方程100道练习题(有答案)
-
解一元一次方程
100
道练习题
1.
2
< br>x
+
1
=
7
2.
5
x
-
2
=
8<
/p>
3.
3
p>
x
+
3
=
2
x
+
7
4.
<
/p>
x
+
5
=
3
x
-
7
5.
11
x
-
2
=
14
x
-
9
6.
x<
/p>
-
9
=
4
x
+
27
7.
1<
/p>
4
x
=-
1
p>
2
x
+
3
8.
x
=
3
2
x
+
16
9.
2
x<
/p>
+
6
=
1
10.
10
p>
x
-
3
=
9
11.
5
x
-
2
=
7
x
+
< br>8
12.
< br>1
-
3
2
x
=
3
x
+
5
2
13.
4
x
-
2
=
3
p>
-
x
14.
-
7
x
+
2
=
p>
2
x
-
4
15.
-
x
=-
2
5
x
+
1
16.
2
x
-
1
3
=-<
/p>
x
3
+
2
17.
4
(
x
+
0
.
5
)+
x
=
7
18.
-
2
(
x
-
1
p>
)=
4
19.
5
(
x
-
1
)=<
/p>
1
20.
<
/p>
2
-(
1
-
p>
x
)=-
2
21.
11
x
+
1
=
5<
/p>
(
2
x
+
1
)
22.
4
x
-
(
3
20<
/p>
-
x
)=
3
p>
23.
5
p>
(
x
+
8
)-
5
=
0
24.
2
(
3
-
x
)=
9
25.
-
3
(
x
+
3
p>
)=
24
26.
-
2
(
x
-
2
p>
)=
12
27.
12
(
2
-
3
x<
/p>
)=
4
x
+
p>
4
28.
p>
6
-
(
3
x
+
2
2
3
)=
3
29.
(
2
200
-
15
x
)=
70
+
25
x
30.
(
3
2
x
+
1
)=
12
31.
x
+
2
5
=
x
p>
4
32.
p>
3
-
x
2
=
x
+
4
3
33.
1
3
(
x
< br>+
1
)=
1
7
(
2
x
-
3
)
34.
1
4
(
x
+
1
p>
)=
1
3
(
x
-
1
)
35.
2
x
-
1
x
+
3
=
2
4
-
1
36.
1
2
(
x
-
1
p>
)=
2
-
1
5
(
x
+
2
)
37.
1
(
x
+
14
)=
1
7
4
(
p>
x
+
20
)
38.
1
5
(
x
+
15
)=
1
2
-
1
3
(
x
-
7
)
39.
1
4
x
-
1
3
2
=
4
40.
7
x
-
5
4
=
p>
3
8
41.
2
x
-
1
5
x
p>
+
1
6
=
8
42.
1
9
x
-
2
2
x
-
< br>7
=
6
43.
1
5
x
-
1
2
p>
(
3
-
2
x
)=
1
44.
2
x
+
1
3
-
p>
5
x
-
1
6
=
1
45.
1
7
(
2
x
+
p>
14
)=
4
-
p>
2
x
46.
3
1
0
(
200
+
x
)-
2
10
(
300
-
x
)=
300
9
25
47.
(
8
3
x
-
1
)-
(
9
5
x
-
11
)-
(
2
2
x
p>
-
7
)=
30
p>
48.
1
2
p>
x
+
1
1
1
3
=
4
x
-
5
49.
0
.
5
x
-
1
p>
0
.
1
x
+
0
.
2
-
2
0
.
< br>3
=-
1
50.
x
-
1
0
.
3
p>
-
x
+
2
0
.
5
=
12
51.
2
x
1
1
2
x
4
52.
0
.
8
x
0
p>
.
1
0
.
5
x
0
.
7
53.
1
2
x
4
p>
2
x
3
5
2
x
54.
3
x
1
7
< br>
x
3
6
55.
x
1
2
x
4
1
p>
3
x
1
6
3
56.
3
2
[
2
3
< br>(
1
2
3
2
x
1
)
2
]
p>
3
2
x
57.
2
[
1
1
1
x
1
< br>10
3
x
3
(
x
3
)]
2
(
2
x
3
p>
)
第
1
页