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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
[0E4-00]
(1)
−5
x
−
2
=
2
x
−
9
x
+
2
(2)
8
x
−
8
=
5
x
+
10
x
−
15
(3)
3
x
+
6
+
5
x
=
3
x
+
56
(4)
4
x
−
1
=
3
x
−
41
+
9
x
(5)
−2
x
−
7
=
−7
x
+
13
+
7
x
(6)
3
x
−
10
=
9
x
+
78
+
5
x
(7)
3
x
+
10
x
+
2
=
−7
x
−
78
(8)
−5
x
−
2
=
x
−
x
+
13
(9)
−3
+
8
x
=
5
x
+
6
x
+
12
(10)
3
x
−
5
x
−
7
=
4
x
−
1
(11)
−7
x
+
6
=
−9
x
−
8
+
9
x
(12)
−9
x
+
9
=
10
x
+
57
−
3
x
(13)
−2
x
−
4
=
−2
x
+
21
−
5
x
(14)
−7
x
−
1
+
x
=
−5
x
+
9
©2026 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
−5
x
−
2
=
2
x
−
9
x
+
2
−5
x
−
2
x
+
9
x
=
2
+
2
x
=
4
÷
2
x
=
2
(2)
8
x
−
8
=
5
x
+
10
x
−
15
8
x
−
5
x
−
10
x
=
−15
+
8
x
=
−7
÷
(
−7
)
x
=
1
(3)
3
x
+
6
+
5
x
=
3
x
+
56
3
x
+
5
x
−
3
x
=
56
−
6
x
=
50
÷
5
x
=
10
(4)
4
x
−
1
=
3
x
−
41
+
9
x
4
x
−
3
x
−
9
x
=
−41
+
1
x
=
−40
÷
(
−8
)
x
=
5
(5)
−2
x
−
7
=
−7
x
+
13
+
7
x
−2
x
+
7
x
−
7
x
=
13
+
7
x
=
20
÷
(
−2
)
x
=
−10
(6)
3
x
−
10
=
9
x
+
78
+
5
x
3
x
−
9
x
−
5
x
=
78
+
10
x
=
88
÷
(
−11
)
x
=
−8
(7)
3
x
+
10
x
+
2
=
−7
x
−
78
3
x
+
10
x
+
7
x
=
−
78
−
2
x
=
−80
÷
20
x
=
−4
(8)
−5
x
−
2
=
x
−
x
+
13
−5
x
−
x
+
x
=
13
+
2
x
=
15
÷
(
−5
)
x
=
−3
(9)
−3
+
8
x
=
5
x
+
6
x
+
12
8
x
−
5
x
−
6
x
=
12
+
3
x
=
15
÷
(
−3
)
x
=
−5
(10)
3
x
−
5
x
−
7
=
4
x
−
1
3
x
−
5
x
−
4
x
=
−1
+
7
x
=
6
÷
(
−6
)
x
=
−1
(11)
−7
x
+
6
=
−9
x
−
8
+
9
x
−7
x
+
9
x
−
9
x
=
−
8
−
6
x
=
−14
÷
(
−7
)
x
=
2
(12)
−9
x
+
9
=
10
x
+
57
−
3
x
−9
x
−
10
x
+
3
x
=
57
−
9
x
=
48
÷
(
−16
)
x
=
−3
(13)
−2
x
−
4
=
−2
x
+
21
−
5
x
−2
x
+
2
x
+
5
x
=
21
+
4
x
=
25
÷
5
x
=
5
(14)
−7
x
−
1
+
x
=
−5
x
+
9
−7
x
+
x
+
5
x
=
9
+
1
x
=
10
÷
(
−1
)
x
=
−10