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©2018 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
=
0
(2)
2
(
x
−
7
)
=
36
(3)
2
(
x
−
6
)
−
10
=
0
(4)
2
(
x
＋
3
)
−
6
=
0
(5)
2
(
x
＋
9
)
−
9
=
0
(6)
2
(
x
＋
5
)
=
2
(7)
2
(
x
＋
9
)
=
49
(8)
2
(
x
−
7
)
=
36
(9)
2
(
x
＋
10
)
−
64
=
0
(10)
2
(
x
＋
5
)
−
5
=
0
(11)
2
(
x
＋
2
)
−
6
=
0
(12)
2
(
x
−
4
)
=
3
©2018 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
2
(
x
＋
1
)
−
1
=
0
x
＋
1
=
±
1
x
=
−
1
±
1
x
=
0
，
−2
(2)
2
(
x
−
7
)
=
36
x
−
7
=
±
6
x
=
7
±
6
x
=
13
，
1
(3)
2
(
x
−
6
)
−
10
=
0
x
−
6
10
=
±
x
10
=
6
±
(4)
2
(
x
＋
3
)
−
6
=
0
x
＋
3
6
=
±
x
6
=
−
3
±
(5)
2
(
x
＋
9
)
−
9
=
0
x
＋
9
=
±
3
x
=
−
9
±
3
x
=
−6
，
−12
(6)
2
(
x
＋
5
)
=
2
x
＋
5
2
=
±
x
2
=
−
5
±
(7)
2
(
x
＋
9
)
=
49
x
＋
9
=
±
7
x
=
−
9
±
7
x
=
−2
，
−16
(8)
2
(
x
−
7
)
=
36
x
−
7
=
±
6
x
=
7
±
6
x
=
13
，
1
(9)
2
(
x
＋
10
)
−
64
=
0
x
＋
10
=
±
8
x
=
−
10
±
8
x
=
−2
，
−18
(10)
2
(
x
＋
5
)
−
5
=
0
x
＋
5
5
=
±
x
5
=
−
5
±
(11)
2
(
x
＋
2
)
−
6
=
0
x
＋
2
6
=
±
x
6
=
−
2
±
(12)
2
(
x
−
4
)
=
3
x
−
4
3
=
±
x
3
=
4
±