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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
x
−
6
x
=
0
(2)
2
x
+
5
x
=
0
(3)
2
6
x
=
12
x
(4)
2
2
x
+
8
x
=
0
(5)
2
3
x
+
30
x
=
0
(6)
2
10
x
−
40
x
=
0
(7)
2
9
x
−
10
x
=
0
(8)
2
x
−
9
x
=
0
(9)
2
4
x
+
3
x
=
0
(10)
2
6
x
=
24
x
©2026 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
2
x
−
6
x
=
0
x
(
x
−
6
)
=
0
x
=
0
,
6
(2)
2
x
+
5
x
=
0
x
(
x
+
5
)
=
0
x
=
0
,
−5
(3)
2
6
x
=
12
x
6
x
(
x
−
2
)
=
0
x
=
0
,
2
(4)
2
2
x
+
8
x
=
0
2
x
(
x
+
4
)
=
0
x
=
0
,
−4
(5)
2
3
x
+
30
x
=
0
3
x
(
x
+
10
)
=
0
x
=
0
,
−10
(6)
2
10
x
−
40
x
=
0
10
x
(
x
−
4
)
=
0
x
=
0
,
4
(7)
2
9
x
−
10
x
=
0
10
9
x
(
x
−
)
9
=
0
x
10
=
0
,
9
(8)
2
x
−
9
x
=
0
x
(
x
−
9
)
=
0
x
=
0
,
9
(9)
2
4
x
+
3
x
=
0
3
4
x
(
x
+
)
4
=
0
x
3
=
0
,
−
4
(10)
2
6
x
=
24
x
6
x
(
x
−
4
)
=
0
x
=
0
,
4