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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
−
7
)
=
2
(2)
2
(
x
−
7
)
−
9
=
0
(3)
2
(
x
＋
6
)
−
16
=
0
(4)
2
(
x
−
1
)
=
64
(5)
2
(
x
−
6
)
=
8
(6)
2
(
x
＋
3
)
=
9
(7)
2
(
x
＋
3
)
−
16
=
0
(8)
2
(
x
−
6
)
=
2
(9)
2
(
x
＋
7
)
=
36
(10)
2
(
x
＋
7
)
−
81
=
0
(11)
2
(
x
−
6
)
=
9
(12)
2
(
x
−
4
)
=
3
©2026 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
2
(
x
−
7
)
=
2
x
−
7
2
=
±
x
2
=
7
±
(2)
2
(
x
−
7
)
−
9
=
0
x
−
7
=
±
3
x
=
7
±
3
x
=
10
，
4
(3)
2
(
x
＋
6
)
−
16
=
0
x
＋
6
=
±
4
x
=
−
6
±
4
x
=
−2
，
−10
(4)
2
(
x
−
1
)
=
64
x
−
1
=
±
8
x
=
1
±
8
x
=
9
，
−7
(5)
2
(
x
−
6
)
=
8
x
−
6
2
=
±
2
x
2
=
6
±
2
(6)
2
(
x
＋
3
)
=
9
x
＋
3
=
±
3
x
=
−
3
±
3
x
=
0
，
−6
(7)
2
(
x
＋
3
)
−
16
=
0
x
＋
3
=
±
4
x
=
−
3
±
4
x
=
1
，
−7
(8)
2
(
x
−
6
)
=
2
x
−
6
2
=
±
x
2
=
6
±
(9)
2
(
x
＋
7
)
=
36
x
＋
7
=
±
6
x
=
−
7
±
6
x
=
−1
，
−13
(10)
2
(
x
＋
7
)
−
81
=
0
x
＋
7
=
±
9
x
=
−
7
±
9
x
=
2
，
−16
(11)
2
(
x
−
6
)
=
9
x
−
6
=
±
3
x
=
6
±
3
x
=
9
，
3
(12)
2
(
x
−
4
)
=
3
x
−
4
3
=
±
x
3
=
4
±