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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)
6
3
72
(
x
−
10
)
=
−
7
2
7
(2)
−1.4
(
0.4
x
+
6
)
=
−5.6
(3)
3
77
7
(
−0.4
x
+
)
=
4
4
(4)
−10
(
8
x
+
8
)
=
−216
(5)
−1.3
(
−10
x
+
1
)
=
63.7
©2026 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
6
3
72
(
x
−
10
)
=
−
7
2
7
9
60
x
−
7
7
72
=
−
7
9
x
7
72
60
=
−
+
7
7
x
4
=
−
3
(2)
−1.4
(
0.4
x
+
6
)
=
−5.6
−0.56
x
−
8.4
=
−5.6
−0.56
x
=
−5.6
+
8.4
x
=
−5
(3)
3
77
7
(
−0.4
x
+
)
=
4
4
21
−2.8
x
+
4
77
=
4
−2.8
x
77
21
=
−
4
4
x
=
−5
(4)
−10
(
8
x
+
8
)
=
−216
−80
x
−
80
=
−216
−80
x
=
−216
+
80
x
17
=
10
(5)
−1.3
(
−10
x
+
1
)
=
63.7
13
x
−
1.3
=
63.7
13
x
=
63.7
+
1.3
x
=
5