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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
=
5
(2)
2
10
x
=
3
(3)
2
5
x
=
320
(4)
2
−4
x
=
−6
(5)
2
3
x
=
108
(6)
2
5
x
=
500
(7)
2
4
x
=
4
(8)
2
−2
x
=
−200
(9)
2
−5
x
=
−5
(10)
2
−2
x
=
−32
(11)
2
5
x
=
5
(12)
2
−3
x
=
−108
©2025 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
2
5
x
=
5
2
x
=
1
x
=
±
1
(2)
2
10
x
=
3
2
x
3
=
10
x
30
=
±
10
(3)
2
5
x
=
320
2
x
=
64
x
=
±
8
(4)
2
−4
x
=
−6
2
x
3
=
2
x
6
=
±
2
(5)
2
3
x
=
108
2
x
=
36
x
=
±
6
(6)
2
5
x
=
500
2
x
=
100
x
=
±
10
(7)
2
4
x
=
4
2
x
=
1
x
=
±
1
(8)
2
−2
x
=
−200
2
x
=
100
x
=
±
10
(9)
2
−5
x
=
−5
2
x
=
1
x
=
±
1
(10)
2
−2
x
=
−32
2
x
=
16
x
=
±
4
(11)
2
5
x
=
5
2
x
=
1
x
=
±
1
(12)
2
−3
x
=
−108
2
x
=
36
x
=
±
6