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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
+
9
)
=
36
(2)
2
(
x
+
4
)
=
1
(3)
2
(
x
−
3
)
=
25
(4)
2
(
x
+
10
)
=
25
(5)
2
(
x
−
3
)
=
6
(6)
2
(
x
−
2
)
=
64
(7)
2
(
x
+
7
)
=
9
(8)
2
(
x
+
3
)
=
36
(9)
2
(
x
+
3
)
−
10
=
0
(10)
2
(
x
−
6
)
−
100
=
0
(11)
2
(
x
+
10
)
=
4
(12)
2
(
x
+
1
)
−
1
=
0
©2025 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
2
(
x
+
9
)
=
36
x
+
9
=
±
6
x
=
−
9
±
6
x
=
−3
,
−15
(2)
2
(
x
+
4
)
=
1
x
+
4
=
±
1
x
=
−
4
±
1
x
=
−3
,
−5
(3)
2
(
x
−
3
)
=
25
x
−
3
=
±
5
x
=
3
±
5
x
=
8
,
−2
(4)
2
(
x
+
10
)
=
25
x
+
10
=
±
5
x
=
−
10
±
5
x
=
−5
,
−15
(5)
2
(
x
−
3
)
=
6
x
−
3
6
=
±
x
6
=
3
±
(6)
2
(
x
−
2
)
=
64
x
−
2
=
±
8
x
=
2
±
8
x
=
10
,
−6
(7)
2
(
x
+
7
)
=
9
x
+
7
=
±
3
x
=
−
7
±
3
x
=
−4
,
−10
(8)
2
(
x
+
3
)
=
36
x
+
3
=
±
6
x
=
−
3
±
6
x
=
3
,
−9
(9)
2
(
x
+
3
)
−
10
=
0
x
+
3
10
=
±
x
10
=
−
3
±
(10)
2
(
x
−
6
)
−
100
=
0
x
−
6
=
±
10
x
=
6
±
10
x
=
16
,
−4
(11)
2
(
x
+
10
)
=
4
x
+
10
=
±
2
x
=
−
10
±
2
x
=
−8
,
−12
(12)
2
(
x
+
1
)
−
1
=
0
x
+
1
=
±
1
x
=
−
1
±
1
x
=
0
,
−2