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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
[0E1-20]
(1)
1
1
x
=
2
5
(2)
5
1
x
=
7
2
(3)
11
5
−
x
=
−
7
7
(4)
9
3
x
=
−
5
7
(5)
1
2
x
=
3
3
(6)
1
13
−
x
=
2
9
(7)
1
2
−
x
=
−
7
3
(8)
11
1
−
x
=
7
2
(9)
3
3
x
=
−
10
2
(10)
4
7
−
x
=
−
3
6
(11)
3
2
−
x
=
10
5
(12)
1
1
x
=
5
2
(13)
5
12
x
=
3
7
(14)
3
1
x
=
−
2
6
©2025 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
1
1
x
=
2
5
x
2
=
5
(2)
5
1
x
=
7
2
x
7
=
10
(3)
11
5
−
x
=
−
7
7
x
5
=
11
(4)
9
3
x
=
−
5
7
x
5
=
−
21
(5)
1
2
x
=
3
3
x
=
2
(6)
1
13
−
x
=
2
9
x
26
=
−
9
(7)
1
2
−
x
=
−
7
3
x
14
=
3
(8)
11
1
−
x
=
7
2
x
7
=
−
22
(9)
3
3
x
=
−
10
2
x
=
−5
(10)
4
7
−
x
=
−
3
6
x
7
=
8
(11)
3
2
−
x
=
10
5
x
4
=
−
3
(12)
1
1
x
=
5
2
x
5
=
2
(13)
5
12
x
=
3
7
x
36
=
35
(14)
3
1
x
=
−
2
6
x
1
=
−
9