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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
3
(2)
9
9
x
=
7
8
(3)
8
13
−
x
=
7
10
(4)
8
3
x
=
9
2
(5)
1
2
−
x
=
3
7
(6)
5
1
−
x
=
6
2
(7)
4
9
−
x
=
5
7
(8)
5
1
x
=
3
2
(9)
1
9
x
=
3
8
(10)
2
1
x
=
−
3
8
(11)
1
3
−
x
=
3
5
(12)
7
x
=
0
9
(13)
7
6
−
x
=
5
5
(14)
1
4
x
=
−
4
9
©2025 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
1
1
−
x
=
2
3
x
2
=
−
3
(2)
9
9
x
=
7
8
x
7
=
8
(3)
8
13
−
x
=
7
10
x
91
=
−
80
(4)
8
3
x
=
9
2
x
27
=
16
(5)
1
2
−
x
=
3
7
x
6
=
−
7
(6)
5
1
−
x
=
6
2
x
3
=
−
5
(7)
4
9
−
x
=
5
7
x
45
=
−
28
(8)
5
1
x
=
3
2
x
3
=
10
(9)
1
9
x
=
3
8
x
27
=
8
(10)
2
1
x
=
−
3
8
x
3
=
−
16
(11)
1
3
−
x
=
3
5
x
9
=
−
5
(12)
7
x
=
0
9
x
=
0
(13)
7
6
−
x
=
5
5
x
6
=
−
7
(14)
1
4
x
=
−
4
9
x
16
=
−
9