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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)
3
2
5
x
=
2
7
(2)
2
1
x
=
5
(3)
2
1
x
=
3
(4)
2
4
−3
x
=
−
3
(5)
2
8
2
x
=
9
(6)
2
27
3
x
=
49
(7)
2
−3
x
=
−3
(8)
2
50
2
x
=
49
(9)
2
2
1
−
x
=
−
3
2
(10)
2
−3
x
=
−3
©2026 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
3
2
x
2
5
=
7
2
x
10
=
21
x
210
=
±
21
(2)
2
x
1
=
5
x
5
=
±
5
(3)
2
x
1
=
3
x
3
=
±
3
(4)
2
−3
x
4
=
−
3
2
x
4
=
9
x
2
=
±
3
(5)
2
2
x
8
=
9
2
x
4
=
9
x
2
=
±
3
(6)
2
3
x
27
=
49
2
x
9
=
49
x
3
=
±
7
(7)
2
−3
x
=
−3
2
x
=
1
x
=
±
1
(8)
2
2
x
50
=
49
2
x
25
=
49
x
5
=
±
7
(9)
2
2
−
x
3
1
=
−
2
2
x
3
=
4
x
1
3
=
±
2
(10)
2
−3
x
=
−3
2
x
=
1
x
=
±
1