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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
[0E2-00]
(1)
7
＋
(
−8
)
x
=
55
(2)
3
＋
(
−5
)
x
=
53
(3)
−4
x
−
60
=
6
x
(4)
−6
−
(
−5
)
x
=
−
x
(5)
9
x
＋
13
=
−4
x
(6)
−3
x
−
49
=
4
x
(7)
2
＋
(
−8
)
x
=
74
(8)
−7
x
＋
9
=
−5
(9)
−2
−
(
−8
)
x
=
46
(10)
−4
x
−
(
−7
)
=
−17
(11)
4
x
＋
(
−45
)
=
−5
x
(12)
−4
x
−
(
−1
)
=
−5
x
(13)
−2
＋
(
−6
)
x
=
40
(14)
10
x
−
60
=
4
x
©2026 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
7
＋
(
−8
)
x
=
55
−8
x
=
55
−
7
−8
x
=
48
x
=
−6
(2)
3
＋
(
−5
)
x
=
53
−5
x
=
53
−
3
−5
x
=
50
x
=
−10
(3)
−4
x
−
60
=
6
x
−4
x
−
6
x
=
60
−10
x
=
60
x
=
−6
(4)
−6
−
(
−5
)
x
=
−
x
5
x
＋
x
=
6
6
x
=
6
x
=
1
(5)
9
x
＋
13
=
−4
x
9
x
＋
4
x
=
−
13
13
x
=
−13
x
=
−1
(6)
−3
x
−
49
=
4
x
−3
x
−
4
x
=
49
−7
x
=
49
x
=
−7
(7)
2
＋
(
−8
)
x
=
74
−8
x
=
74
−
2
−8
x
=
72
x
=
−9
(8)
−7
x
＋
9
=
−5
−7
x
=
−5
−
9
−7
x
=
−14
x
=
2
(9)
−2
−
(
−8
)
x
=
46
8
x
=
46
＋
2
8
x
=
48
x
=
6
(10)
−4
x
−
(
−7
)
=
−17
−4
x
=
−17
−
7
−4
x
=
−24
x
=
6
(11)
4
x
＋
(
−45
)
=
−5
x
4
x
＋
5
x
=
45
9
x
=
45
x
=
5
(12)
−4
x
−
(
−1
)
=
−5
x
−4
x
＋
5
x
=
−1
x
=
−1
(13)
−2
＋
(
−6
)
x
=
40
−6
x
=
40
＋
2
−6
x
=
42
x
=
−7
(14)
10
x
−
60
=
4
x
10
x
−
4
x
=
60
6
x
=
60
x
=
10