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©2026 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
=
−320
(2)
2
3
x
=
48
(3)
2
7
x
=
3
(4)
2
−3
x
=
−6
(5)
2
−5
x
=
−3
(6)
2
−7
x
=
−6
(7)
2
8
x
=
5
(8)
2
−5
x
=
−180
(9)
2
10
x
=
6
(10)
2
2
x
=
3
(11)
2
−2
x
=
−72
(12)
2
7
x
=
5
©2026 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
2
−5
x
=
−320
2
x
=
64
x
=
±
8
(2)
2
3
x
=
48
2
x
=
16
x
=
±
4
(3)
2
7
x
=
3
2
x
3
=
7
x
21
=
±
7
(4)
2
−3
x
=
−6
2
x
=
2
x
2
=
±
(5)
2
−5
x
=
−3
2
x
3
=
5
x
15
=
±
5
(6)
2
−7
x
=
−6
2
x
6
=
7
x
42
=
±
7
(7)
2
8
x
=
5
2
x
5
=
8
x
1
10
=
±
4
(8)
2
−5
x
=
−180
2
x
=
36
x
=
±
6
(9)
2
10
x
=
6
2
x
3
=
5
x
15
=
±
5
(10)
2
2
x
=
3
2
x
3
=
2
x
6
=
±
2
(11)
2
−2
x
=
−72
2
x
=
36
x
=
±
6
(12)
2
7
x
=
5
2
x
5
=
7
x
35
=
±
7