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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
＋
10
)
−
1
=
0
(3)
2
(
x
＋
5
)
−
36
=
0
(4)
2
(
x
＋
3
)
=
16
(5)
2
(
x
＋
3
)
=
1
(6)
2
(
x
−
2
)
=
1
(7)
2
(
x
−
3
)
=
81
(8)
2
(
x
＋
1
)
=
9
(9)
2
(
x
−
4
)
=
49
(10)
2
(
x
＋
9
)
−
9
=
0
(11)
2
(
x
−
3
)
=
36
(12)
2
(
x
＋
5
)
−
2
=
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
＋
10
)
−
1
=
0
x
＋
10
=
±
1
x
=
−
10
±
1
x
=
−9
，
−11
(3)
2
(
x
＋
5
)
−
36
=
0
x
＋
5
=
±
6
x
=
−
5
±
6
x
=
1
，
−11
(4)
2
(
x
＋
3
)
=
16
x
＋
3
=
±
4
x
=
−
3
±
4
x
=
1
，
−7
(5)
2
(
x
＋
3
)
=
1
x
＋
3
=
±
1
x
=
−
3
±
1
x
=
−2
，
−4
(6)
2
(
x
−
2
)
=
1
x
−
2
=
±
1
x
=
2
±
1
x
=
3
，
1
(7)
2
(
x
−
3
)
=
81
x
−
3
=
±
9
x
=
3
±
9
x
=
12
，
−6
(8)
2
(
x
＋
1
)
=
9
x
＋
1
=
±
3
x
=
−
1
±
3
x
=
2
，
−4
(9)
2
(
x
−
4
)
=
49
x
−
4
=
±
7
x
=
4
±
7
x
=
11
，
−3
(10)
2
(
x
＋
9
)
−
9
=
0
x
＋
9
=
±
3
x
=
−
9
±
3
x
=
−6
，
−12
(11)
2
(
x
−
3
)
=
36
x
−
3
=
±
6
x
=
3
±
6
x
=
9
，
−3
(12)
2
(
x
＋
5
)
−
2
=
0
x
＋
5
2
=
±
x
2
=
−
5
±