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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)
7
+
10
x
+
9
x
=
−9
x
+
175
(2)
−8
x
−
2
=
−
x
−
x
+
28
(3)
−6
x
+
7
+
8
x
=
−3
x
−
23
(4)
7
x
+
8
x
−
9
=
−9
x
−
81
(5)
−
x
−
8
=
−4
x
−
8
+
3
x
(6)
4
+
8
x
=
2
x
+
8
x
+
6
(7)
2
x
+
5
+
7
x
=
−5
x
+
61
(8)
−9
−
2
x
=
9
x
−
8
x
−
15
(9)
7
−
2
x
+
7
x
=
−6
x
−
92
(10)
−6
x
−
10
x
−
9
=
4
x
+
111
(11)
−3
+
2
x
+
8
x
=
−8
x
+
69
(12)
9
−
9
x
+
5
x
=
2
x
+
51
(13)
8
−
8
x
=
−7
x
+
x
+
4
(14)
−5
x
−
10
x
+
9
=
4
x
−
29
©2026 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
7
+
10
x
+
9
x
=
−9
x
+
175
10
x
+
9
x
+
9
x
=
175
−
7
x
=
168
÷
28
x
=
6
(2)
−8
x
−
2
=
−
x
−
x
+
28
−8
x
+
x
+
x
=
28
+
2
x
=
30
÷
(
−6
)
x
=
−5
(3)
−6
x
+
7
+
8
x
=
−3
x
−
23
−6
x
+
8
x
+
3
x
=
−23
−
7
x
=
−30
÷
5
x
=
−6
(4)
7
x
+
8
x
−
9
=
−9
x
−
81
7
x
+
8
x
+
9
x
=
−81
+
9
x
=
−72
÷
24
x
=
−3
(5)
−
x
−
8
=
−4
x
−
8
+
3
x
−
x
+
4
x
−
3
x
=
−8
+
8
x
=
0
÷
0
x
=
NAN
(6)
4
+
8
x
=
2
x
+
8
x
+
6
8
x
−
2
x
−
8
x
=
6
−
4
x
=
2
÷
(
−2
)
x
=
−1
(7)
2
x
+
5
+
7
x
=
−5
x
+
61
2
x
+
7
x
+
5
x
=
61
−
5
x
=
56
÷
14
x
=
4
(8)
−9
−
2
x
=
9
x
−
8
x
−
15
−2
x
−
9
x
+
8
x
=
−15
+
9
x
=
−6
÷
(
−3
)
x
=
2
(9)
7
−
2
x
+
7
x
=
−6
x
−
92
−2
x
+
7
x
+
6
x
=
−92
−
7
x
=
−99
÷
11
x
=
−9
(10)
−6
x
−
10
x
−
9
=
4
x
+
111
−6
x
−
10
x
−
4
x
=
111
+
9
x
=
120
÷
(
−20
)
x
=
−6
(11)
−3
+
2
x
+
8
x
=
−8
x
+
69
2
x
+
8
x
+
8
x
=
69
+
3
x
=
72
÷
18
x
=
4
(12)
9
−
9
x
+
5
x
=
2
x
+
51
−9
x
+
5
x
−
2
x
=
51
−
9
x
=
42
÷
(
−6
)
x
=
−7
(13)
8
−
8
x
=
−7
x
+
x
+
4
−8
x
+
7
x
−
x
=
4
−
8
x
=
−4
÷
(
−2
)
x
=
2
(14)
−5
x
−
10
x
+
9
=
4
x
−
29
−5
x
−
10
x
−
4
x
=
−
29
−
9
x
=
−38
÷
(
−19
)
x
=
2