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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
)
=
16
(2)
2
(
x
＋
8
)
=
3
(3)
2
(
x
＋
6
)
=
16
(4)
2
(
x
−
7
)
−
3
=
0
(5)
2
(
x
＋
8
)
−
1
=
0
(6)
2
(
x
＋
8
)
−
81
=
0
(7)
2
(
x
＋
5
)
=
3
(8)
2
(
x
＋
8
)
=
25
(9)
2
(
x
−
3
)
=
36
(10)
2
(
x
−
6
)
=
4
(11)
2
(
x
＋
10
)
=
6
(12)
2
(
x
＋
10
)
=
25
©2026 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
2
(
x
−
4
)
=
16
x
−
4
=
±
4
x
=
4
±
4
x
=
8
，
0
(2)
2
(
x
＋
8
)
=
3
x
＋
8
3
=
±
x
3
=
−
8
±
(3)
2
(
x
＋
6
)
=
16
x
＋
6
=
±
4
x
=
−
6
±
4
x
=
−2
，
−10
(4)
2
(
x
−
7
)
−
3
=
0
x
−
7
3
=
±
x
3
=
7
±
(5)
2
(
x
＋
8
)
−
1
=
0
x
＋
8
=
±
1
x
=
−
8
±
1
x
=
−7
，
−9
(6)
2
(
x
＋
8
)
−
81
=
0
x
＋
8
=
±
9
x
=
−
8
±
9
x
=
1
，
−17
(7)
2
(
x
＋
5
)
=
3
x
＋
5
3
=
±
x
3
=
−
5
±
(8)
2
(
x
＋
8
)
=
25
x
＋
8
=
±
5
x
=
−
8
±
5
x
=
−3
，
−13
(9)
2
(
x
−
3
)
=
36
x
−
3
=
±
6
x
=
3
±
6
x
=
9
，
−3
(10)
2
(
x
−
6
)
=
4
x
−
6
=
±
2
x
=
6
±
2
x
=
8
，
4
(11)
2
(
x
＋
10
)
=
6
x
＋
10
6
=
±
x
6
=
−
10
±
(12)
2
(
x
＋
10
)
=
25
x
＋
10
=
±
5
x
=
−
10
±
5
x
=
−5
，
−15