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