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