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©2024 数学クラブ http://sugaku.club/
月 日（ ）
● 次の方程式を解きなさい
[0E2-00]
(1)
−
x
＋
(
−2
)
=
−9
(2)
30
＋
6
x
=
x
(3)
−3
x
−
20
=
x
(4)
−4
x
＋
(
−45
)
=
x
(5)
10
x
＋
(
−9
)
=
−89
(6)
7
x
＋
(
−7
)
=
6
x
(7)
−3
＋
(
−7
)
x
=
53
(8)
−7
＋
3
x
=
11
(9)
2
x
−
(
−9
)
=
x
(10)
−36
−
3
x
=
3
x
(11)
6
＋
(
−4
)
x
=
38
(12)
−
x
−
7
=
−8
(13)
−7
x
＋
2
=
−47
(14)
9
x
−
7
=
8
x
©2024 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
−
x
＋
(
−2
)
=
−9
−
x
=
−9
＋
2
−
x
=
−7
x
=
7
(2)
30
＋
6
x
=
x
6
x
−
x
=
−
30
5
x
=
−30
x
=
−6
(3)
−3
x
−
20
=
x
−3
x
−
x
=
20
−4
x
=
20
x
=
−5
(4)
−4
x
＋
(
−45
)
=
x
−4
x
−
x
=
45
−5
x
=
45
x
=
−9
(5)
10
x
＋
(
−9
)
=
−89
10
x
=
−89
＋
9
10
x
=
−80
x
=
−8
(6)
7
x
＋
(
−7
)
=
6
x
7
x
−
6
x
=
7
x
=
7
(7)
−3
＋
(
−7
)
x
=
53
−7
x
=
53
＋
3
−7
x
=
56
x
=
−8
(8)
−7
＋
3
x
=
11
3
x
=
11
＋
7
3
x
=
18
x
=
6
(9)
2
x
−
(
−9
)
=
x
2
x
−
x
=
−9
x
=
−9
(10)
−36
−
3
x
=
3
x
−
3
x
−
3
x
=
36
−6
x
=
36
x
=
−6
(11)
6
＋
(
−4
)
x
=
38
−4
x
=
38
−
6
−4
x
=
32
x
=
−8
(12)
−
x
−
7
=
−8
−
x
=
−8
＋
7
−
x
=
−1
x
=
1
(13)
−7
x
＋
2
=
−47
−7
x
=
−47
−
2
−7
x
=
−49
x
=
7
(14)
9
x
−
7
=
8
x
9
x
−
8
x
=
7
x
=
7