［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
−
3
)
−
1
=
0
(2)
2
(
x
＋
10
)
=
9
(3)
2
(
x
＋
6
)
=
9
(4)
2
(
x
−
4
)
=
1
(5)
2
(
x
＋
7
)
=
4
(6)
2
(
x
＋
10
)
=
4
(7)
2
(
x
＋
6
)
=
1
(8)
2
(
x
＋
8
)
=
9
(9)
2
(
x
＋
10
)
=
100
(10)
2
(
x
＋
6
)
=
100
(11)
2
(
x
＋
4
)
−
81
=
0
(12)
2
(
x
−
5
)
=
9
©2026 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
2
(
x
−
3
)
−
1
=
0
x
−
3
=
±
1
x
=
3
±
1
x
=
4
，
2
(2)
2
(
x
＋
10
)
=
9
x
＋
10
=
±
3
x
=
−
10
±
3
x
=
−7
，
−13
(3)
2
(
x
＋
6
)
=
9
x
＋
6
=
±
3
x
=
−
6
±
3
x
=
−3
，
−9
(4)
2
(
x
−
4
)
=
1
x
−
4
=
±
1
x
=
4
±
1
x
=
5
，
3
(5)
2
(
x
＋
7
)
=
4
x
＋
7
=
±
2
x
=
−
7
±
2
x
=
−5
，
−9
(6)
2
(
x
＋
10
)
=
4
x
＋
10
=
±
2
x
=
−
10
±
2
x
=
−8
，
−12
(7)
2
(
x
＋
6
)
=
1
x
＋
6
=
±
1
x
=
−
6
±
1
x
=
−5
，
−7
(8)
2
(
x
＋
8
)
=
9
x
＋
8
=
±
3
x
=
−
8
±
3
x
=
−5
，
−11
(9)
2
(
x
＋
10
)
=
100
x
＋
10
=
±
10
x
=
−
10
±
10
x
=
0
，
−20
(10)
2
(
x
＋
6
)
=
100
x
＋
6
=
±
10
x
=
−
6
±
10
x
=
4
，
−16
(11)
2
(
x
＋
4
)
−
81
=
0
x
＋
4
=
±
9
x
=
−
4
±
9
x
=
5
，
−13
(12)
2
(
x
−
5
)
=
9
x
−
5
=
±
3
x
=
5
±
3
x
=
8
，
2