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©2024 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
16
5
x
=
5
(2)
2
20
5
x
=
9
(3)
2
3
x
=
3
(4)
2
−5
x
=
−5
(5)
2
45
5
x
=
49
(6)
2
5
5
x
=
16
(7)
2
3
x
=
3
(8)
2
1
−3
x
=
−
3
(9)
2
8
2
x
=
49
(10)
2
245
−5
x
=
−
36
©2024 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
2
5
x
16
=
5
2
x
16
=
25
x
4
=
±
5
(2)
2
5
x
20
=
9
2
x
4
=
9
x
2
=
±
3
(3)
2
3
x
=
3
2
x
=
1
x
=
±
1
(4)
2
−5
x
=
−5
2
x
=
1
x
=
±
1
(5)
2
5
x
45
=
49
2
x
9
=
49
x
3
=
±
7
(6)
2
5
x
5
=
16
2
x
1
=
16
x
1
=
±
4
(7)
2
3
x
=
3
2
x
=
1
x
=
±
1
(8)
2
−3
x
1
=
−
3
2
x
1
=
9
x
1
=
±
3
(9)
2
2
x
8
=
49
2
x
4
=
49
x
2
=
±
7
(10)
2
−5
x
245
=
−
36
2
x
49
=
36
x
7
=
±
6