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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)
1
3
20
10
(
x
+
)
=
6
2
3
(2)
43
10
(
0.5
x
−
1.1
)
=
−
3
(3)
5
1
(
−0.6
x
+
1.6
)
=
7
2
(4)
8
174
6
(
2
x
+
)
=
7
7
(5)
8
(
1.1
x
+
9
)
=
107.2
©2026 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
1
3
20
10
(
x
+
)
=
6
2
3
5
x
+
15
3
20
=
3
5
x
3
20
=
−
15
3
x
=
−5
(2)
43
10
(
0.5
x
−
1.1
)
=
−
3
5
x
−
11
43
=
−
3
5
x
43
=
−
+
11
3
x
2
=
−
3
(3)
5
1
(
−0.6
x
+
1.6
)
=
7
2
3
8
−
x
+
7
7
1
=
2
3
−
x
7
1
8
=
−
2
7
x
3
=
2
(4)
8
174
6
(
2
x
+
)
=
7
7
48
12
x
+
7
174
=
7
12
x
174
48
=
−
7
7
x
3
=
2
(5)
8
(
1.1
x
+
9
)
=
107.2
8.8
x
+
72
=
107.2
8.8
x
=
107.2
−
72
x
=
4