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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
[210-20]
(1)
2
−
x
=
−1
(2)
2
−5
x
=
−5
(3)
2
2
−
x
=
−1
5
(4)
2
2
x
=
3
(5)
2
2
−2
x
=
−
9
(6)
2
12
3
x
=
25
(7)
2
5
5
x
=
49
(8)
2
3
3
x
=
25
(9)
2
5
5
x
=
16
(10)
2
1
3
x
=
12
©2025 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
2
−
x
=
−1
2
x
=
1
x
=
±
1
(2)
2
−5
x
=
−5
2
x
=
1
x
=
±
1
(3)
2
2
−
x
5
=
−1
2
x
5
=
2
x
10
=
±
2
(4)
2
x
2
=
3
x
6
=
±
3
(5)
2
−2
x
2
=
−
9
2
x
1
=
9
x
1
=
±
3
(6)
2
3
x
12
=
25
2
x
4
=
25
x
2
=
±
5
(7)
2
5
x
5
=
49
2
x
1
=
49
x
1
=
±
7
(8)
2
3
x
3
=
25
2
x
1
=
25
x
1
=
±
5
(9)
2
5
x
5
=
16
2
x
1
=
16
x
1
=
±
4
(10)
2
3
x
1
=
12
2
x
1
=
36
x
1
=
±
6