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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
[210-20]
(1)
2
3
x
=
3
(2)
2
5
x
=
5
(3)
2
−5
x
=
−5
(4)
2
27
−3
x
=
−
4
(5)
2
32
2
x
=
25
(6)
2
1
−2
x
=
−
18
(7)
2
75
−3
x
=
−
49
(8)
2
1
−
x
=
−
2
(9)
6
2
x
=
1
5
(10)
2
125
5
x
=
36
©2026 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
2
3
x
=
3
2
x
=
1
x
=
±
1
(2)
2
5
x
=
5
2
x
=
1
x
=
±
1
(3)
2
−5
x
=
−5
2
x
=
1
x
=
±
1
(4)
2
−3
x
27
=
−
4
2
x
9
=
4
x
3
=
±
2
(5)
2
2
x
32
=
25
2
x
16
=
25
x
4
=
±
5
(6)
2
−2
x
1
=
−
18
2
x
1
=
36
x
1
=
±
6
(7)
2
−3
x
75
=
−
49
2
x
25
=
49
x
5
=
±
7
(8)
2
−
x
1
=
−
2
2
x
1
=
2
x
2
=
±
2
(9)
6
2
x
5
=
1
2
x
5
=
6
x
30
=
±
6
(10)
2
5
x
125
=
36
2
x
25
=
36
x
5
=
±
6