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©2025 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
−
4
)
−
6
=
0
(2)
2
(
x
−
1
)
=
4
(3)
2
(
x
＋
6
)
−
49
=
0
(4)
2
(
x
−
4
)
=
9
(5)
2
(
x
＋
2
)
−
1
=
0
(6)
2
(
x
＋
3
)
=
3
(7)
2
(
x
−
2
)
=
2
(8)
2
(
x
＋
9
)
=
36
(9)
2
(
x
＋
7
)
−
1
=
0
(10)
2
(
x
＋
7
)
=
6
(11)
2
(
x
＋
1
)
−
1
=
0
(12)
2
(
x
＋
8
)
−
1
=
0
©2025 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
2
(
x
−
4
)
−
6
=
0
x
−
4
6
=
±
x
6
=
4
±
(2)
2
(
x
−
1
)
=
4
x
−
1
=
±
2
x
=
1
±
2
x
=
3
，
−1
(3)
2
(
x
＋
6
)
−
49
=
0
x
＋
6
=
±
7
x
=
−
6
±
7
x
=
1
，
−13
(4)
2
(
x
−
4
)
=
9
x
−
4
=
±
3
x
=
4
±
3
x
=
7
，
1
(5)
2
(
x
＋
2
)
−
1
=
0
x
＋
2
=
±
1
x
=
−
2
±
1
x
=
−1
，
−3
(6)
2
(
x
＋
3
)
=
3
x
＋
3
3
=
±
x
3
=
−
3
±
(7)
2
(
x
−
2
)
=
2
x
−
2
2
=
±
x
2
=
2
±
(8)
2
(
x
＋
9
)
=
36
x
＋
9
=
±
6
x
=
−
9
±
6
x
=
−3
，
−15
(9)
2
(
x
＋
7
)
−
1
=
0
x
＋
7
=
±
1
x
=
−
7
±
1
x
=
−6
，
−8
(10)
2
(
x
＋
7
)
=
6
x
＋
7
6
=
±
x
6
=
−
7
±
(11)
2
(
x
＋
1
)
−
1
=
0
x
＋
1
=
±
1
x
=
−
1
±
1
x
=
0
，
−2
(12)
2
(
x
＋
8
)
−
1
=
0
x
＋
8
=
±
1
x
=
−
8
±
1
x
=
−7
，
−9