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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
2
3
−
x
=
−
3
5
(3)
2
1
−3
x
=
−
3
(4)
2
5
−5
x
=
−
4
(5)
2
−3
x
=
−3
(6)
2
3
−3
x
=
−
4
(7)
2
7
x
=
6
(8)
2
−3
x
=
−3
(9)
2
75
−3
x
=
−
49
(10)
2
20
5
x
=
9
©2025 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
2
x
=
1
x
=
±
1
(2)
2
2
−
x
3
3
=
−
5
2
x
9
=
10
x
3
10
=
±
10
(3)
2
−3
x
1
=
−
3
2
x
1
=
9
x
1
=
±
3
(4)
2
−5
x
5
=
−
4
2
x
1
=
4
x
1
=
±
2
(5)
2
−3
x
=
−3
2
x
=
1
x
=
±
1
(6)
2
−3
x
3
=
−
4
2
x
1
=
4
x
1
=
±
2
(7)
2
x
7
=
6
x
42
=
±
6
(8)
2
−3
x
=
−3
2
x
=
1
x
=
±
1
(9)
2
−3
x
75
=
−
49
2
x
25
=
49
x
5
=
±
7
(10)
2
5
x
20
=
9
2
x
4
=
9
x
2
=
±
3