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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
−
3
)
=
4
(2)
2
(
x
＋
3
)
=
1
(3)
2
(
x
−
7
)
=
64
(4)
2
(
x
−
6
)
=
36
(5)
2
(
x
＋
1
)
−
1
=
0
(6)
2
(
x
−
3
)
=
9
(7)
2
(
x
−
2
)
=
7
(8)
2
(
x
＋
3
)
=
25
(9)
2
(
x
＋
5
)
=
2
(10)
2
(
x
＋
3
)
=
16
(11)
2
(
x
＋
8
)
=
4
(12)
2
(
x
＋
9
)
−
81
=
0
©2026 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
2
(
x
−
3
)
=
4
x
−
3
=
±
2
x
=
3
±
2
x
=
5
，
1
(2)
2
(
x
＋
3
)
=
1
x
＋
3
=
±
1
x
=
−
3
±
1
x
=
−2
，
−4
(3)
2
(
x
−
7
)
=
64
x
−
7
=
±
8
x
=
7
±
8
x
=
15
，
−1
(4)
2
(
x
−
6
)
=
36
x
−
6
=
±
6
x
=
6
±
6
x
=
12
，
0
(5)
2
(
x
＋
1
)
−
1
=
0
x
＋
1
=
±
1
x
=
−
1
±
1
x
=
0
，
−2
(6)
2
(
x
−
3
)
=
9
x
−
3
=
±
3
x
=
3
±
3
x
=
6
，
0
(7)
2
(
x
−
2
)
=
7
x
−
2
7
=
±
x
7
=
2
±
(8)
2
(
x
＋
3
)
=
25
x
＋
3
=
±
5
x
=
−
3
±
5
x
=
2
，
−8
(9)
2
(
x
＋
5
)
=
2
x
＋
5
2
=
±
x
2
=
−
5
±
(10)
2
(
x
＋
3
)
=
16
x
＋
3
=
±
4
x
=
−
3
±
4
x
=
1
，
−7
(11)
2
(
x
＋
8
)
=
4
x
＋
8
=
±
2
x
=
−
8
±
2
x
=
−6
，
−10
(12)
2
(
x
＋
9
)
−
81
=
0
x
＋
9
=
±
9
x
=
−
9
±
9
x
=
0
，
−18