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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
−
6
)
=
49
(2)
2
(
x
＋
7
)
=
4
(3)
2
(
x
−
2
)
=
2
(4)
2
(
x
−
2
)
=
1
(5)
2
(
x
＋
8
)
=
25
(6)
2
(
x
＋
10
)
−
6
=
0
(7)
2
(
x
＋
10
)
=
4
(8)
2
(
x
−
1
)
=
81
(9)
2
(
x
−
4
)
=
6
(10)
2
(
x
＋
2
)
=
3
(11)
2
(
x
＋
3
)
=
1
(12)
2
(
x
−
4
)
−
1
=
0
©2026 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
2
(
x
−
6
)
=
49
x
−
6
=
±
7
x
=
6
±
7
x
=
13
，
−1
(2)
2
(
x
＋
7
)
=
4
x
＋
7
=
±
2
x
=
−
7
±
2
x
=
−5
，
−9
(3)
2
(
x
−
2
)
=
2
x
−
2
2
=
±
x
2
=
2
±
(4)
2
(
x
−
2
)
=
1
x
−
2
=
±
1
x
=
2
±
1
x
=
3
，
1
(5)
2
(
x
＋
8
)
=
25
x
＋
8
=
±
5
x
=
−
8
±
5
x
=
−3
，
−13
(6)
2
(
x
＋
10
)
−
6
=
0
x
＋
10
6
=
±
x
6
=
−
10
±
(7)
2
(
x
＋
10
)
=
4
x
＋
10
=
±
2
x
=
−
10
±
2
x
=
−8
，
−12
(8)
2
(
x
−
1
)
=
81
x
−
1
=
±
9
x
=
1
±
9
x
=
10
，
−8
(9)
2
(
x
−
4
)
=
6
x
−
4
6
=
±
x
6
=
4
±
(10)
2
(
x
＋
2
)
=
3
x
＋
2
3
=
±
x
3
=
−
2
±
(11)
2
(
x
＋
3
)
=
1
x
＋
3
=
±
1
x
=
−
3
±
1
x
=
−2
，
−4
(12)
2
(
x
−
4
)
−
1
=
0
x
−
4
=
±
1
x
=
4
±
1
x
=
5
，
3