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©2025 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
8
x
−
3
x
=
0
(2)
2
x
+
7
x
=
0
(3)
2
6
x
−
x
=
0
(4)
2
7
x
−
21
x
=
0
(5)
2
6
x
+
60
x
=
0
(6)
2
6
x
−
18
x
=
0
(7)
2
6
x
+
18
x
=
0
(8)
2
2
x
−
2
x
=
0
(9)
2
6
x
−
42
x
=
0
(10)
2
9
x
+
7
x
=
0
©2025 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
2
8
x
−
3
x
=
0
3
8
x
(
x
−
)
8
=
0
x
3
=
0
,
8
(2)
2
x
+
7
x
=
0
x
(
x
+
7
)
=
0
x
=
0
,
−7
(3)
2
6
x
−
x
=
0
1
6
x
(
x
−
)
6
=
0
x
1
=
0
,
6
(4)
2
7
x
−
21
x
=
0
7
x
(
x
−
3
)
=
0
x
=
0
,
3
(5)
2
6
x
+
60
x
=
0
6
x
(
x
+
10
)
=
0
x
=
0
,
−10
(6)
2
6
x
−
18
x
=
0
6
x
(
x
−
3
)
=
0
x
=
0
,
3
(7)
2
6
x
+
18
x
=
0
6
x
(
x
+
3
)
=
0
x
=
0
,
−3
(8)
2
2
x
−
2
x
=
0
2
x
(
x
−
1
)
=
0
x
=
0
,
1
(9)
2
6
x
−
42
x
=
0
6
x
(
x
−
7
)
=
0
x
=
0
,
7
(10)
2
9
x
+
7
x
=
0
7
9
x
(
x
+
)
9
=
0
x
7
=
0
,
−
9