［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
)
−
49
=
0
(2)
2
(
x
＋
8
)
=
6
(3)
2
(
x
−
3
)
−
10
=
0
(4)
2
(
x
＋
6
)
−
25
=
0
(5)
2
(
x
−
7
)
−
7
=
0
(6)
2
(
x
＋
7
)
=
64
(7)
2
(
x
＋
4
)
=
4
(8)
2
(
x
−
4
)
=
81
(9)
2
(
x
−
1
)
=
9
(10)
2
(
x
＋
7
)
=
16
(11)
2
(
x
−
5
)
=
81
(12)
2
(
x
−
6
)
=
9
©2026 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
2
(
x
−
3
)
−
49
=
0
x
−
3
=
±
7
x
=
3
±
7
x
=
10
，
−4
(2)
2
(
x
＋
8
)
=
6
x
＋
8
6
=
±
x
6
=
−
8
±
(3)
2
(
x
−
3
)
−
10
=
0
x
−
3
10
=
±
x
10
=
3
±
(4)
2
(
x
＋
6
)
−
25
=
0
x
＋
6
=
±
5
x
=
−
6
±
5
x
=
−1
，
−11
(5)
2
(
x
−
7
)
−
7
=
0
x
−
7
7
=
±
x
7
=
7
±
(6)
2
(
x
＋
7
)
=
64
x
＋
7
=
±
8
x
=
−
7
±
8
x
=
1
，
−15
(7)
2
(
x
＋
4
)
=
4
x
＋
4
=
±
2
x
=
−
4
±
2
x
=
−2
，
−6
(8)
2
(
x
−
4
)
=
81
x
−
4
=
±
9
x
=
4
±
9
x
=
13
，
−5
(9)
2
(
x
−
1
)
=
9
x
−
1
=
±
3
x
=
1
±
3
x
=
4
，
−2
(10)
2
(
x
＋
7
)
=
16
x
＋
7
=
±
4
x
=
−
7
±
4
x
=
−3
，
−11
(11)
2
(
x
−
5
)
=
81
x
−
5
=
±
9
x
=
5
±
9
x
=
14
，
−4
(12)
2
(
x
−
6
)
=
9
x
−
6
=
±
3
x
=
6
±
3
x
=
9
，
3