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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)
12
7
x
=
7
5
(2)
3
8
x
=
2
9
(3)
9
1
x
=
5
5
(4)
1
1
−
x
=
−
2
4
(5)
5
x
=
0
4
(6)
3
10
−
x
=
−
2
7
(7)
3
3
x
=
−
2
5
(8)
6
−
x
=
0
5
(9)
5
x
=
0
7
(10)
2
1
−
x
=
3
7
(11)
2
2
x
=
−
5
5
(12)
5
1
−
x
=
3
6
(13)
4
2
x
=
3
3
(14)
4
1
−
x
=
9
2
©2025 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
12
7
x
=
7
5
x
49
=
60
(2)
3
8
x
=
2
9
x
16
=
27
(3)
9
1
x
=
5
5
x
1
=
9
(4)
1
1
−
x
=
−
2
4
x
1
=
2
(5)
5
x
=
0
4
x
=
0
(6)
3
10
−
x
=
−
2
7
x
20
=
21
(7)
3
3
x
=
−
2
5
x
2
=
−
5
(8)
6
−
x
=
0
5
x
=
0
(9)
5
x
=
0
7
x
=
0
(10)
2
1
−
x
=
3
7
x
3
=
−
14
(11)
2
2
x
=
−
5
5
x
=
−1
(12)
5
1
−
x
=
3
6
x
1
=
−
10
(13)
4
2
x
=
3
3
x
1
=
2
(14)
4
1
−
x
=
9
2
x
9
=
−
8