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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
1
−2
x
=
−
8
(2)
2
20
5
x
=
9
(3)
2
−3
x
=
−3
(4)
2
−2
x
=
−2
(5)
1
2
2
−
x
=
−
4
5
(6)
2
27
−3
x
=
−
25
(7)
2
3
−3
x
=
−
16
(8)
2
1
2
x
=
8
(9)
2
5
−5
x
=
−
4
(10)
2
−5
x
=
−5
©2024 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
2
−2
x
1
=
−
8
2
x
1
=
16
x
1
=
±
4
(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
−2
x
=
−2
2
x
=
1
x
=
±
1
(5)
1
2
−
x
4
2
=
−
5
2
x
8
=
5
x
2
10
=
±
5
(6)
2
−3
x
27
=
−
25
2
x
9
=
25
x
3
=
±
5
(7)
2
−3
x
3
=
−
16
2
x
1
=
16
x
1
=
±
4
(8)
2
2
x
1
=
8
2
x
1
=
16
x
1
=
±
4
(9)
2
−5
x
5
=
−
4
2
x
1
=
4
x
1
=
±
2
(10)
2
−5
x
=
−5
2
x
=
1
x
=
±
1