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©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
＋
5
)
=
1
(3)
2
(
x
＋
1
)
=
16
(4)
2
(
x
−
7
)
=
16
(5)
2
(
x
＋
8
)
−
1
=
0
(6)
2
(
x
−
6
)
−
36
=
0
(7)
2
(
x
−
5
)
−
16
=
0
(8)
2
(
x
−
4
)
−
3
=
0
(9)
2
(
x
＋
7
)
=
49
(10)
2
(
x
−
5
)
−
7
=
0
(11)
2
(
x
＋
5
)
=
1
(12)
2
(
x
−
3
)
=
16
©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
＋
5
)
=
1
x
＋
5
=
±
1
x
=
−
5
±
1
x
=
−4
，
−6
(3)
2
(
x
＋
1
)
=
16
x
＋
1
=
±
4
x
=
−
1
±
4
x
=
3
，
−5
(4)
2
(
x
−
7
)
=
16
x
−
7
=
±
4
x
=
7
±
4
x
=
11
，
3
(5)
2
(
x
＋
8
)
−
1
=
0
x
＋
8
=
±
1
x
=
−
8
±
1
x
=
−7
，
−9
(6)
2
(
x
−
6
)
−
36
=
0
x
−
6
=
±
6
x
=
6
±
6
x
=
12
，
0
(7)
2
(
x
−
5
)
−
16
=
0
x
−
5
=
±
4
x
=
5
±
4
x
=
9
，
1
(8)
2
(
x
−
4
)
−
3
=
0
x
−
4
3
=
±
x
3
=
4
±
(9)
2
(
x
＋
7
)
=
49
x
＋
7
=
±
7
x
=
−
7
±
7
x
=
0
，
−14
(10)
2
(
x
−
5
)
−
7
=
0
x
−
5
7
=
±
x
7
=
5
±
(11)
2
(
x
＋
5
)
=
1
x
＋
5
=
±
1
x
=
−
5
±
1
x
=
−4
，
−6
(12)
2
(
x
−
3
)
=
16
x
−
3
=
±
4
x
=
3
±
4
x
=
7
，
−1