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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
4
x
=
3
(2)
2
2
x
=
3
(3)
2
5
x
=
5
(4)
1
2
2
x
=
5
5
(5)
2
1
−2
x
=
−
2
(6)
2
5
x
=
5
(7)
2
3
−3
x
=
−
16
(8)
2
48
3
x
=
49
(9)
2
−2
x
=
−2
(10)
2
20
−5
x
=
−
49
©2026 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
2
x
4
=
3
x
2
3
=
±
3
(2)
2
x
2
=
3
x
6
=
±
3
(3)
2
5
x
=
5
2
x
=
1
x
=
±
1
(4)
1
2
x
5
2
=
5
2
x
=
2
x
2
=
±
(5)
2
−2
x
1
=
−
2
2
x
1
=
4
x
1
=
±
2
(6)
2
5
x
=
5
2
x
=
1
x
=
±
1
(7)
2
−3
x
3
=
−
16
2
x
1
=
16
x
1
=
±
4
(8)
2
3
x
48
=
49
2
x
16
=
49
x
4
=
±
7
(9)
2
−2
x
=
−2
2
x
=
1
x
=
±
1
(10)
2
−5
x
20
=
−
49
2
x
4
=
49
x
2
=
±
7