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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
)
=
16
(2)
2
(
x
−
4
)
=
100
(3)
2
(
x
−
2
)
=
3
(4)
2
(
x
−
2
)
=
9
(5)
2
(
x
−
5
)
−
64
=
0
(6)
2
(
x
＋
2
)
=
36
(7)
2
(
x
＋
9
)
−
10
=
0
(8)
2
(
x
−
5
)
=
36
(9)
2
(
x
−
3
)
−
4
=
0
(10)
2
(
x
−
2
)
=
100
(11)
2
(
x
−
2
)
−
36
=
0
(12)
2
(
x
＋
9
)
−
1
=
0
©2026 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
2
(
x
＋
6
)
=
16
x
＋
6
=
±
4
x
=
−
6
±
4
x
=
−2
，
−10
(2)
2
(
x
−
4
)
=
100
x
−
4
=
±
10
x
=
4
±
10
x
=
14
，
−6
(3)
2
(
x
−
2
)
=
3
x
−
2
3
=
±
x
3
=
2
±
(4)
2
(
x
−
2
)
=
9
x
−
2
=
±
3
x
=
2
±
3
x
=
5
，
−1
(5)
2
(
x
−
5
)
−
64
=
0
x
−
5
=
±
8
x
=
5
±
8
x
=
13
，
−3
(6)
2
(
x
＋
2
)
=
36
x
＋
2
=
±
6
x
=
−
2
±
6
x
=
4
，
−8
(7)
2
(
x
＋
9
)
−
10
=
0
x
＋
9
10
=
±
x
10
=
−
9
±
(8)
2
(
x
−
5
)
=
36
x
−
5
=
±
6
x
=
5
±
6
x
=
11
，
−1
(9)
2
(
x
−
3
)
−
4
=
0
x
−
3
=
±
2
x
=
3
±
2
x
=
5
，
1
(10)
2
(
x
−
2
)
=
100
x
−
2
=
±
10
x
=
2
±
10
x
=
12
，
−8
(11)
2
(
x
−
2
)
−
36
=
0
x
−
2
=
±
6
x
=
2
±
6
x
=
8
，
−4
(12)
2
(
x
＋
9
)
−
1
=
0
x
＋
9
=
±
1
x
=
−
9
±
1
x
=
−8
，
−10