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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
[0E8-00]
(1)
−2
x
+
8
6
x
−
7
41
+
=
5
4
20
(2)
7
x
+
1
3
x
+
4
17
=
−
−
3
9
9
(3)
4
x
+
8
6
x
−
1
25
+
=
5
2
2
(4)
6
x
+
7
3
x
+
9
73
+
=
10
5
10
(5)
6
x
−
9
−4
x
+
5
64
=
−
7
7
7
©2025 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
−2
x
+
8
6
x
−
7
41
+
=
5
4
20
4
(
−2
x
+
8
)
+
5
(
6
x
−
7
)
20
41
=
20
4
(
−2
x
+
8
)
+
5
(
6
x
−
7
)
=
41
22
x
−
3
=
41
x
=
2
(2)
7
x
+
1
3
x
+
4
17
=
−
−
3
9
9
3
(
7
x
+
1
)
+
(
3
x
+
4
)
9
17
=
−
9
3
(
7
x
+
1
)
+
3
x
+
4
=
−17
24
x
+
7
=
−17
x
=
−1
(3)
4
x
+
8
6
x
−
1
25
+
=
5
2
2
2
(
4
x
+
8
)
+
5
(
6
x
−
1
)
10
25
=
2
2
(
4
x
+
8
)
+
5
(
6
x
−
1
)
=
125
38
x
+
11
=
125
x
=
3
(4)
6
x
+
7
3
x
+
9
73
+
=
10
5
10
(
6
x
+
7
)
+
2
(
3
x
+
9
)
10
73
=
10
6
x
+
7
+
2
(
3
x
+
9
)
=
73
12
x
+
25
=
73
x
=
4
(5)
6
x
−
9
−4
x
+
5
64
=
−
7
7
7
(
6
x
−
9
)
−
(
−4
x
+
5
)
7
64
=
−
7
6
x
−
9
−
(
−4
x
+
5
)
=
−64
10
x
−
14
=
−64
x
=
−5