［文字サイズの変更］
▼
▲
©2026 数学クラブ http://sugaku.club/
月 日（ ）
● 次の方程式を解きなさい
[210-00]
(1)
2
7
x
=
8
(2)
2
−3
x
=
−108
(3)
2
2
x
=
2
(4)
2
5
x
=
180
(5)
2
−3
x
=
−75
(6)
2
5
x
=
5
(7)
2
8
x
=
5
(8)
2
−5
x
=
−3
(9)
2
8
x
=
7
(10)
2
3
x
=
243
(11)
2
5
x
=
3
(12)
2
3
x
=
4
©2026 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
2
7
x
=
8
2
x
8
=
7
x
2
14
=
±
7
(2)
2
−3
x
=
−108
2
x
=
36
x
=
±
6
(3)
2
2
x
=
2
2
x
=
1
x
=
±
1
(4)
2
5
x
=
180
2
x
=
36
x
=
±
6
(5)
2
−3
x
=
−75
2
x
=
25
x
=
±
5
(6)
2
5
x
=
5
2
x
=
1
x
=
±
1
(7)
2
8
x
=
5
2
x
5
=
8
x
1
10
=
±
4
(8)
2
−5
x
=
−3
2
x
3
=
5
x
15
=
±
5
(9)
2
8
x
=
7
2
x
7
=
8
x
1
14
=
±
4
(10)
2
3
x
=
243
2
x
=
81
x
=
±
9
(11)
2
5
x
=
3
2
x
3
=
5
x
15
=
±
5
(12)
2
3
x
=
4
2
x
4
=
3
x
2
3
=
±
3