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©2019 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
＋
1
)
=
1
(2)
2
(
x
−
6
)
−
16
=
0
(3)
2
(
x
−
1
)
=
4
(4)
2
(
x
−
2
)
=
9
(5)
2
(
x
＋
7
)
=
2
(6)
2
(
x
＋
2
)
=
3
(7)
2
(
x
＋
1
)
=
25
(8)
2
(
x
＋
1
)
−
4
=
0
(9)
2
(
x
−
6
)
−
9
=
0
(10)
2
(
x
＋
4
)
=
36
(11)
2
(
x
＋
6
)
=
1
(12)
2
(
x
＋
9
)
=
5
©2019 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
2
(
x
＋
1
)
=
1
x
＋
1
=
±
1
x
=
−
1
±
1
x
=
0
，
−2
(2)
2
(
x
−
6
)
−
16
=
0
x
−
6
=
±
4
x
=
6
±
4
x
=
10
，
2
(3)
2
(
x
−
1
)
=
4
x
−
1
=
±
2
x
=
1
±
2
x
=
3
，
−1
(4)
2
(
x
−
2
)
=
9
x
−
2
=
±
3
x
=
2
±
3
x
=
5
，
−1
(5)
2
(
x
＋
7
)
=
2
x
＋
7
2
=
±
x
2
=
−
7
±
(6)
2
(
x
＋
2
)
=
3
x
＋
2
3
=
±
x
3
=
−
2
±
(7)
2
(
x
＋
1
)
=
25
x
＋
1
=
±
5
x
=
−
1
±
5
x
=
4
，
−6
(8)
2
(
x
＋
1
)
−
4
=
0
x
＋
1
=
±
2
x
=
−
1
±
2
x
=
1
，
−3
(9)
2
(
x
−
6
)
−
9
=
0
x
−
6
=
±
3
x
=
6
±
3
x
=
9
，
3
(10)
2
(
x
＋
4
)
=
36
x
＋
4
=
±
6
x
=
−
4
±
6
x
=
2
，
−10
(11)
2
(
x
＋
6
)
=
1
x
＋
6
=
±
1
x
=
−
6
±
1
x
=
−5
，
−7
(12)
2
(
x
＋
9
)
=
5
x
＋
9
5
=
±
x
5
=
−
9
±