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©2018 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
3
x
=
16
(2)
2
5
5
x
=
4
(3)
2
3
x
=
2
(4)
2
125
5
x
=
49
(5)
2
8
2
x
=
49
(6)
2
75
3
x
=
49
(7)
2
2
x
=
1
3
(8)
2
49
5
x
=
5
(9)
1
2
1
x
=
3
4
(10)
2
1
2
x
=
2
©2018 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
2
3
x
3
=
16
2
x
1
=
16
x
1
=
±
4
(2)
2
5
x
5
=
4
2
x
1
=
4
x
1
=
±
2
(3)
2
x
3
=
2
x
6
=
±
2
(4)
2
5
x
125
=
49
2
x
25
=
49
x
5
=
±
7
(5)
2
2
x
8
=
49
2
x
4
=
49
x
2
=
±
7
(6)
2
3
x
75
=
49
2
x
25
=
49
x
5
=
±
7
(7)
2
2
x
3
=
1
2
x
3
=
2
x
6
=
±
2
(8)
2
5
x
49
=
5
2
x
49
=
25
x
7
=
±
5
(9)
1
2
x
3
1
=
4
2
x
3
=
4
x
1
3
=
±
2
(10)
2
2
x
1
=
2
2
x
1
=
4
x
1
=
±
2