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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
−2
x
=
−8
(2)
2
−3
x
=
−147
(3)
2
2
x
=
2
(4)
2
2
x
=
72
(5)
2
−5
x
=
−20
(6)
2
5
x
=
45
(7)
2
5
x
=
500
(8)
2
2
x
=
32
(9)
2
−3
x
=
−192
(10)
2
3
x
=
3
(11)
2
−3
x
=
−2
(12)
2
−2
x
=
−8
©2025 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
2
−2
x
=
−8
2
x
=
4
x
=
±
2
(2)
2
−3
x
=
−147
2
x
=
49
x
=
±
7
(3)
2
2
x
=
2
2
x
=
1
x
=
±
1
(4)
2
2
x
=
72
2
x
=
36
x
=
±
6
(5)
2
−5
x
=
−20
2
x
=
4
x
=
±
2
(6)
2
5
x
=
45
2
x
=
9
x
=
±
3
(7)
2
5
x
=
500
2
x
=
100
x
=
±
10
(8)
2
2
x
=
32
2
x
=
16
x
=
±
4
(9)
2
−3
x
=
−192
2
x
=
64
x
=
±
8
(10)
2
3
x
=
3
2
x
=
1
x
=
±
1
(11)
2
−3
x
=
−2
2
x
2
=
3
x
6
=
±
3
(12)
2
−2
x
=
−8
2
x
=
4
x
=
±
2