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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
[210-00]
(1)
2
−5
x
=
−9
(2)
2
3
x
=
108
(3)
2
2
x
=
98
(4)
2
5
x
=
1
(5)
2
−2
x
=
−162
(6)
2
7
x
=
4
(7)
2
3
x
=
147
(8)
2
−2
x
=
−1
(9)
2
−7
x
=
−10
(10)
2
5
x
=
80
(11)
2
6
x
=
5
(12)
2
8
x
=
2
©2025 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
2
−5
x
=
−9
2
x
9
=
5
x
3
5
=
±
5
(2)
2
3
x
=
108
2
x
=
36
x
=
±
6
(3)
2
2
x
=
98
2
x
=
49
x
=
±
7
(4)
2
5
x
=
1
2
x
1
=
5
x
5
=
±
5
(5)
2
−2
x
=
−162
2
x
=
81
x
=
±
9
(6)
2
7
x
=
4
2
x
4
=
7
x
2
7
=
±
7
(7)
2
3
x
=
147
2
x
=
49
x
=
±
7
(8)
2
−2
x
=
−1
2
x
1
=
2
x
2
=
±
2
(9)
2
−7
x
=
−10
2
x
10
=
7
x
70
=
±
7
(10)
2
5
x
=
80
2
x
=
16
x
=
±
4
(11)
2
6
x
=
5
2
x
5
=
6
x
30
=
±
6
(12)
2
8
x
=
2
2
x
1
=
4
x
1
=
±
2