［文字サイズの変更］
▼
▲
©2025 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
−
6
)
−
4
=
0
(2)
2
(
x
＋
8
)
=
9
(3)
2
(
x
−
4
)
=
9
(4)
2
(
x
−
3
)
=
81
(5)
2
(
x
＋
7
)
=
1
(6)
2
(
x
＋
10
)
−
16
=
0
(7)
2
(
x
＋
8
)
=
1
(8)
2
(
x
＋
4
)
=
1
(9)
2
(
x
＋
9
)
−
2
=
0
(10)
2
(
x
−
6
)
=
81
(11)
2
(
x
−
3
)
=
16
(12)
2
(
x
＋
2
)
=
4
©2025 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
2
(
x
−
6
)
−
4
=
0
x
−
6
=
±
2
x
=
6
±
2
x
=
8
，
4
(2)
2
(
x
＋
8
)
=
9
x
＋
8
=
±
3
x
=
−
8
±
3
x
=
−5
，
−11
(3)
2
(
x
−
4
)
=
9
x
−
4
=
±
3
x
=
4
±
3
x
=
7
，
1
(4)
2
(
x
−
3
)
=
81
x
−
3
=
±
9
x
=
3
±
9
x
=
12
，
−6
(5)
2
(
x
＋
7
)
=
1
x
＋
7
=
±
1
x
=
−
7
±
1
x
=
−6
，
−8
(6)
2
(
x
＋
10
)
−
16
=
0
x
＋
10
=
±
4
x
=
−
10
±
4
x
=
−6
，
−14
(7)
2
(
x
＋
8
)
=
1
x
＋
8
=
±
1
x
=
−
8
±
1
x
=
−7
，
−9
(8)
2
(
x
＋
4
)
=
1
x
＋
4
=
±
1
x
=
−
4
±
1
x
=
−3
，
−5
(9)
2
(
x
＋
9
)
−
2
=
0
x
＋
9
2
=
±
x
2
=
−
9
±
(10)
2
(
x
−
6
)
=
81
x
−
6
=
±
9
x
=
6
±
9
x
=
15
，
−3
(11)
2
(
x
−
3
)
=
16
x
−
3
=
±
4
x
=
3
±
4
x
=
7
，
−1
(12)
2
(
x
＋
2
)
=
4
x
＋
2
=
±
2
x
=
−
2
±
2
x
=
0
，
−4