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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
[0E2-00]
(1)
40
＋
7
x
=
2
x
(2)
−40
＋
4
x
=
−4
x
(3)
−
x
−
27
=
−4
x
(4)
−42
＋
8
x
=
x
(5)
−8
x
−
91
=
5
x
(6)
56
＋
(
−4
)
x
=
4
x
(7)
−2
−
10
x
=
8
(8)
8
x
−
(
−4
)
=
−12
(9)
3
x
＋
42
=
−4
x
(10)
−9
x
＋
18
=
−3
x
(11)
7
x
−
(
−7
)
=
28
(12)
180
−
9
x
=
9
x
(13)
−1
＋
x
=
−10
(14)
−8
＋
8
x
=
6
x
©2025 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
40
＋
7
x
=
2
x
7
x
−
2
x
=
−
40
5
x
=
−40
x
=
−8
(2)
−40
＋
4
x
=
−4
x
4
x
＋
4
x
=
40
8
x
=
40
x
=
5
(3)
−
x
−
27
=
−4
x
−
x
＋
4
x
=
27
3
x
=
27
x
=
9
(4)
−42
＋
8
x
=
x
8
x
−
x
=
42
7
x
=
42
x
=
6
(5)
−8
x
−
91
=
5
x
−8
x
−
5
x
=
91
−13
x
=
91
x
=
−7
(6)
56
＋
(
−4
)
x
=
4
x
−4
x
−
4
x
=
−
56
−8
x
=
−56
x
=
7
(7)
−2
−
10
x
=
8
−
10
x
=
8
＋
2
−
10
x
=
10
x
=
−1
(8)
8
x
−
(
−4
)
=
−12
8
x
=
−12
−
4
8
x
=
−16
x
=
−2
(9)
3
x
＋
42
=
−4
x
3
x
＋
4
x
=
−
42
7
x
=
−42
x
=
−6
(10)
−9
x
＋
18
=
−3
x
−9
x
＋
3
x
=
−
18
−6
x
=
−18
x
=
3
(11)
7
x
−
(
−7
)
=
28
7
x
=
28
−
7
7
x
=
21
x
=
3
(12)
180
−
9
x
=
9
x
−
9
x
−
9
x
=
−
180
−18
x
=
−180
x
=
10
(13)
−1
＋
x
=
−10
x
=
−10
＋
1
x
=
−9
x
=
−9
(14)
−8
＋
8
x
=
6
x
8
x
−
6
x
=
8
2
x
=
8
x
=
4