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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
−
7
)
−
100
=
0
(2)
2
(
x
−
5
)
−
100
=
0
(3)
2
(
x
＋
3
)
=
2
(4)
2
(
x
＋
4
)
=
7
(5)
2
(
x
−
5
)
=
16
(6)
2
(
x
−
5
)
−
1
=
0
(7)
2
(
x
−
1
)
=
9
(8)
2
(
x
−
6
)
=
100
(9)
2
(
x
−
1
)
=
8
(10)
2
(
x
＋
2
)
=
5
(11)
2
(
x
＋
4
)
=
4
(12)
2
(
x
＋
6
)
−
4
=
0
©2025 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
2
(
x
−
7
)
−
100
=
0
x
−
7
=
±
10
x
=
7
±
10
x
=
17
，
−3
(2)
2
(
x
−
5
)
−
100
=
0
x
−
5
=
±
10
x
=
5
±
10
x
=
15
，
−5
(3)
2
(
x
＋
3
)
=
2
x
＋
3
2
=
±
x
2
=
−
3
±
(4)
2
(
x
＋
4
)
=
7
x
＋
4
7
=
±
x
7
=
−
4
±
(5)
2
(
x
−
5
)
=
16
x
−
5
=
±
4
x
=
5
±
4
x
=
9
，
1
(6)
2
(
x
−
5
)
−
1
=
0
x
−
5
=
±
1
x
=
5
±
1
x
=
6
，
4
(7)
2
(
x
−
1
)
=
9
x
−
1
=
±
3
x
=
1
±
3
x
=
4
，
−2
(8)
2
(
x
−
6
)
=
100
x
−
6
=
±
10
x
=
6
±
10
x
=
16
，
−4
(9)
2
(
x
−
1
)
=
8
x
−
1
2
=
±
2
x
2
=
1
±
2
(10)
2
(
x
＋
2
)
=
5
x
＋
2
5
=
±
x
5
=
−
2
±
(11)
2
(
x
＋
4
)
=
4
x
＋
4
=
±
2
x
=
−
4
±
2
x
=
−2
，
−6
(12)
2
(
x
＋
6
)
−
4
=
0
x
＋
6
=
±
2
x
=
−
6
±
2
x
=
−4
，
−8