[文字サイズの変更]
▼
▲
©2026 数学クラブ http://sugaku.club/
月 日( )
● 次の方程式を解きなさい
[225-00]
(1)
2
x
+
5
x
−
3
=
x
−
6
(2)
2
x
+
10
x
−
2
=
2
(
6
x
+
23
)
(3)
(
x
+
4
)
(
x
+
1
)
=
2
(
−4
x
−
19
)
(4)
(
x
+
9
)
(
x
−
2
)
=
2
(
−2
x
−
23
)
(5)
(
x
+
5
)
(
x
+
7
)
=
3
(
8
x
+
5
)
©2026 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
2
x
+
5
x
−
3
=
x
−
6
2
x
+
4
x
+
3
=
0
(
x
+
1
)
(
x
+
3
)
=
0
x
=
−1
,
−3
(2)
2
x
+
10
x
−
2
=
2
(
6
x
+
23
)
2
x
−
2
x
−
48
=
0
(
x
+
6
)
(
x
−
8
)
=
0
x
=
−6
,
8
(3)
(
x
+
4
)
(
x
+
1
)
=
2
(
−4
x
−
19
)
2
x
+
5
x
+
4
=
−8
x
−
38
2
x
+
13
x
+
42
=
0
(
x
+
6
)
(
x
+
7
)
=
0
x
=
−6
,
−7
(4)
(
x
+
9
)
(
x
−
2
)
=
2
(
−2
x
−
23
)
2
x
+
7
x
−
18
=
−4
x
−
46
2
x
+
11
x
+
28
=
0
(
x
+
7
)
(
x
+
4
)
=
0
x
=
−7
,
−4
(5)
(
x
+
5
)
(
x
+
7
)
=
3
(
8
x
+
5
)
2
x
+
12
x
+
35
=
24
x
+
15
2
x
−
12
x
+
20
=
0
(
x
−
2
)
(
x
−
10
)
=
0
x
=
2
,
10