［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
[211-00]
(1)
2
(
x
−
4
)
=
1
(2)
2
(
x
−
7
)
=
2
(3)
2
(
x
−
6
)
=
9
(4)
2
(
x
−
3
)
=
5
(5)
2
(
x
＋
10
)
=
4
(6)
2
(
x
＋
7
)
=
25
(7)
2
(
x
＋
1
)
=
4
(8)
2
(
x
−
4
)
=
25
(9)
2
(
x
−
2
)
=
81
(10)
2
(
x
＋
9
)
=
2
(11)
2
(
x
＋
5
)
−
64
=
0
(12)
2
(
x
＋
5
)
=
81
©2026 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
2
(
x
−
4
)
=
1
x
−
4
=
±
1
x
=
4
±
1
x
=
5
，
3
(2)
2
(
x
−
7
)
=
2
x
−
7
2
=
±
x
2
=
7
±
(3)
2
(
x
−
6
)
=
9
x
−
6
=
±
3
x
=
6
±
3
x
=
9
，
3
(4)
2
(
x
−
3
)
=
5
x
−
3
5
=
±
x
5
=
3
±
(5)
2
(
x
＋
10
)
=
4
x
＋
10
=
±
2
x
=
−
10
±
2
x
=
−8
，
−12
(6)
2
(
x
＋
7
)
=
25
x
＋
7
=
±
5
x
=
−
7
±
5
x
=
−2
，
−12
(7)
2
(
x
＋
1
)
=
4
x
＋
1
=
±
2
x
=
−
1
±
2
x
=
1
，
−3
(8)
2
(
x
−
4
)
=
25
x
−
4
=
±
5
x
=
4
±
5
x
=
9
，
−1
(9)
2
(
x
−
2
)
=
81
x
−
2
=
±
9
x
=
2
±
9
x
=
11
，
−7
(10)
2
(
x
＋
9
)
=
2
x
＋
9
2
=
±
x
2
=
−
9
±
(11)
2
(
x
＋
5
)
−
64
=
0
x
＋
5
=
±
8
x
=
−
5
±
8
x
=
3
，
−13
(12)
2
(
x
＋
5
)
=
81
x
＋
5
=
±
9
x
=
−
5
±
9
x
=
4
，
−14