［文字サイズの変更］
▼
▲
©2018 数学クラブ http://sugaku.club/
月 日（ ）
● 次の方程式を解きなさい
[211-20]
(1)
2
16
(
x
＋
1
)
=
9
(2)
1
2
(
x
−
)
=
1
3
(3)
2
1
(
x
−
1
)
−
=
0
4
(4)
6
2
4
(
x
−
)
=
7
9
(5)
1
2
1
(
x
＋
)
=
2
4
(6)
2
4
(
x
−
1
)
=
49
(7)
1
2
25
(
x
＋
)
=
2
36
(8)
4
2
(
x
−
)
−
1
=
0
7
(9)
1
2
(
x
−
)
−
1
=
0
2
(10)
6
2
1
(
x
−
)
=
7
3
©2018 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
2
(
x
＋
1
)
16
=
9
x
＋
1
4
=
±
3
x
4
=
−
1
±
3
x
1
7
=
，
−
3
3
(2)
1
2
(
x
−
)
3
=
1
1
x
−
3
=
±
1
x
1
=
±
1
3
x
4
2
=
，
−
3
3
(3)
2
1
(
x
−
1
)
−
4
=
0
x
−
1
1
=
±
2
x
1
=
1
±
2
x
3
1
=
，
2
2
(4)
6
2
(
x
−
)
7
4
=
9
6
x
−
7
2
=
±
3
x
6
2
=
±
7
3
x
32
4
=
，
21
21
(5)
1
2
(
x
＋
)
2
1
=
4
1
x
＋
2
1
=
±
2
x
1
1
=
−
±
2
2
x
=
0
，
−1
(6)
2
(
x
−
1
)
4
=
49
x
−
1
2
=
±
7
x
2
=
1
±
7
x
9
5
=
，
7
7
(7)
1
2
(
x
＋
)
2
25
=
36
1
x
＋
2
5
=
±
6
x
1
5
=
−
±
2
6
x
1
4
=
，
−
3
3
(8)
4
2
(
x
−
)
−
1
7
=
0
4
x
−
7
=
±
1
x
4
=
±
1
7
x
11
3
=
，
−
7
7
(9)
1
2
(
x
−
)
−
1
2
=
0
1
x
−
2
=
±
1
x
1
=
±
1
2
x
3
1
=
，
−
2
2
(10)
6
2
(
x
−
)
7
1
=
3
6
x
−
7
3
=
±
3
x
6
3
=
±
7
3