［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
)
=
4
(2)
2
(
x
−
4
)
−
10
=
0
(3)
2
(
x
−
3
)
=
25
(4)
2
(
x
＋
6
)
=
1
(5)
2
(
x
−
6
)
−
1
=
0
(6)
2
(
x
＋
9
)
=
7
(7)
2
(
x
−
5
)
=
10
(8)
2
(
x
＋
6
)
=
16
(9)
2
(
x
−
4
)
=
4
(10)
2
(
x
＋
7
)
−
3
=
0
(11)
2
(
x
−
3
)
−
6
=
0
(12)
2
(
x
−
7
)
=
1
©2026 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
2
(
x
−
4
)
=
4
x
−
4
=
±
2
x
=
4
±
2
x
=
6
，
2
(2)
2
(
x
−
4
)
−
10
=
0
x
−
4
10
=
±
x
10
=
4
±
(3)
2
(
x
−
3
)
=
25
x
−
3
=
±
5
x
=
3
±
5
x
=
8
，
−2
(4)
2
(
x
＋
6
)
=
1
x
＋
6
=
±
1
x
=
−
6
±
1
x
=
−5
，
−7
(5)
2
(
x
−
6
)
−
1
=
0
x
−
6
=
±
1
x
=
6
±
1
x
=
7
，
5
(6)
2
(
x
＋
9
)
=
7
x
＋
9
7
=
±
x
7
=
−
9
±
(7)
2
(
x
−
5
)
=
10
x
−
5
10
=
±
x
10
=
5
±
(8)
2
(
x
＋
6
)
=
16
x
＋
6
=
±
4
x
=
−
6
±
4
x
=
−2
，
−10
(9)
2
(
x
−
4
)
=
4
x
−
4
=
±
2
x
=
4
±
2
x
=
6
，
2
(10)
2
(
x
＋
7
)
−
3
=
0
x
＋
7
3
=
±
x
3
=
−
7
±
(11)
2
(
x
−
3
)
−
6
=
0
x
−
3
6
=
±
x
6
=
3
±
(12)
2
(
x
−
7
)
=
1
x
−
7
=
±
1
x
=
7
±
1
x
=
8
，
6