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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
10
x
=
4
x
(2)
2
4
x
−
2
x
=
0
(3)
2
10
x
=
−
2
x
(4)
2
5
x
−
35
x
=
0
(5)
2
10
x
+
3
x
=
0
(6)
2
8
x
−
16
x
=
0
(7)
2
7
x
−
14
x
=
0
(8)
2
2
x
−
4
x
=
0
(9)
2
10
x
−
100
x
=
0
(10)
2
5
x
+
15
x
=
0
©2025 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
2
10
x
=
4
x
2
10
x
(
x
−
)
5
=
0
x
2
=
0
,
5
(2)
2
4
x
−
2
x
=
0
1
4
x
(
x
−
)
2
=
0
x
1
=
0
,
2
(3)
2
10
x
=
−
2
x
1
10
x
(
x
+
)
5
=
0
x
1
=
0
,
−
5
(4)
2
5
x
−
35
x
=
0
5
x
(
x
−
7
)
=
0
x
=
0
,
7
(5)
2
10
x
+
3
x
=
0
3
10
x
(
x
+
)
10
=
0
x
3
=
0
,
−
10
(6)
2
8
x
−
16
x
=
0
8
x
(
x
−
2
)
=
0
x
=
0
,
2
(7)
2
7
x
−
14
x
=
0
7
x
(
x
−
2
)
=
0
x
=
0
,
2
(8)
2
2
x
−
4
x
=
0
2
x
(
x
−
2
)
=
0
x
=
0
,
2
(9)
2
10
x
−
100
x
=
0
10
x
(
x
−
10
)
=
0
x
=
0
,
10
(10)
2
5
x
+
15
x
=
0
5
x
(
x
+
3
)
=
0
x
=
0
,
−3