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©2026 数学クラブ http://sugaku.club/
月 日( )
● 次の方程式を解きなさい
[222-00]
(1)
2
6
x
=
x
(2)
2
9
x
+
5
x
=
0
(3)
2
10
x
−
8
x
=
0
(4)
2
7
x
=
28
x
(5)
2
9
x
+
45
x
=
0
(6)
2
8
x
−
24
x
=
0
(7)
2
3
x
=
10
x
(8)
2
x
=
5
x
(9)
2
2
x
−
18
x
=
0
(10)
2
8
x
−
32
x
=
0
©2026 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
2
6
x
=
x
1
6
x
(
x
−
)
6
=
0
x
1
=
0
,
6
(2)
2
9
x
+
5
x
=
0
5
9
x
(
x
+
)
9
=
0
x
5
=
0
,
−
9
(3)
2
10
x
−
8
x
=
0
4
10
x
(
x
−
)
5
=
0
x
4
=
0
,
5
(4)
2
7
x
=
28
x
7
x
(
x
−
4
)
=
0
x
=
0
,
4
(5)
2
9
x
+
45
x
=
0
9
x
(
x
+
5
)
=
0
x
=
0
,
−5
(6)
2
8
x
−
24
x
=
0
8
x
(
x
−
3
)
=
0
x
=
0
,
3
(7)
2
3
x
=
10
x
10
3
x
(
x
−
)
3
=
0
x
10
=
0
,
3
(8)
2
x
=
5
x
x
(
x
−
5
)
=
0
x
=
0
,
5
(9)
2
2
x
−
18
x
=
0
2
x
(
x
−
9
)
=
0
x
=
0
,
9
(10)
2
8
x
−
32
x
=
0
8
x
(
x
−
4
)
=
0
x
=
0
,
4