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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
[0E5-30]
(1)
10
13
9
−1.8
(
x
+
)
=
7
7
5
(2)
9
69
1.5
(
x
+
7
)
=
−
5
5
(3)
3
1
19
(
2
x
+
)
=
2
3
6
(4)
358
2
(
10
x
+
1
)
=
9
(5)
3
175
−7
(
x
−
5
)
=
2
6
©2026 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
10
13
9
−1.8
(
x
+
)
=
7
7
5
18
117
−
x
−
7
35
9
=
5
18
−
x
7
9
117
=
+
5
35
x
=
−2
(2)
9
69
1.5
(
x
+
7
)
=
−
5
5
27
x
+
10.5
10
69
=
−
5
27
x
10
69
=
−
−
10.5
5
x
=
−9
(3)
3
1
19
(
2
x
+
)
=
2
3
6
1
3
x
+
2
19
=
6
3
x
19
1
=
−
6
2
x
8
=
9
(4)
358
2
(
10
x
+
1
)
=
9
20
x
+
2
358
=
9
20
x
358
=
−
2
9
x
17
=
9
(5)
3
175
−7
(
x
−
5
)
=
2
6
21
−
x
+
35
2
175
=
6
21
−
x
2
175
=
−
35
6
x
5
=
9