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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
)
=
1
(2)
2
(
x
＋
7
)
=
1
(3)
2
(
x
＋
6
)
=
4
(4)
2
(
x
＋
10
)
=
36
(5)
2
(
x
−
2
)
−
16
=
0
(6)
2
(
x
−
6
)
=
2
(7)
2
(
x
−
6
)
=
100
(8)
2
(
x
−
2
)
=
49
(9)
2
(
x
−
6
)
−
3
=
0
(10)
2
(
x
＋
4
)
=
81
(11)
2
(
x
＋
8
)
=
1
(12)
2
(
x
−
6
)
−
1
=
0
©2026 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
2
(
x
＋
7
)
=
1
x
＋
7
=
±
1
x
=
−
7
±
1
x
=
−6
，
−8
(2)
2
(
x
＋
7
)
=
1
x
＋
7
=
±
1
x
=
−
7
±
1
x
=
−6
，
−8
(3)
2
(
x
＋
6
)
=
4
x
＋
6
=
±
2
x
=
−
6
±
2
x
=
−4
，
−8
(4)
2
(
x
＋
10
)
=
36
x
＋
10
=
±
6
x
=
−
10
±
6
x
=
−4
，
−16
(5)
2
(
x
−
2
)
−
16
=
0
x
−
2
=
±
4
x
=
2
±
4
x
=
6
，
−2
(6)
2
(
x
−
6
)
=
2
x
−
6
2
=
±
x
2
=
6
±
(7)
2
(
x
−
6
)
=
100
x
−
6
=
±
10
x
=
6
±
10
x
=
16
，
−4
(8)
2
(
x
−
2
)
=
49
x
−
2
=
±
7
x
=
2
±
7
x
=
9
，
−5
(9)
2
(
x
−
6
)
−
3
=
0
x
−
6
3
=
±
x
3
=
6
±
(10)
2
(
x
＋
4
)
=
81
x
＋
4
=
±
9
x
=
−
4
±
9
x
=
5
，
−13
(11)
2
(
x
＋
8
)
=
1
x
＋
8
=
±
1
x
=
−
8
±
1
x
=
−7
，
−9
(12)
2
(
x
−
6
)
−
1
=
0
x
−
6
=
±
1
x
=
6
±
1
x
=
7
，
5