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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)
8
(
10
x
+
6
)
=
−272
(2)
−0.2
(
−
x
+
9
)
=
−0.8
(3)
4
6
44
(
−
x
+
6
)
=
3
7
7
(4)
5
21
7
(
−
x
−
0.5
)
=
−
8
8
(5)
−
(
6
x
+
10
)
=
−16
©2026 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
8
(
10
x
+
6
)
=
−272
80
x
+
48
=
−272
80
x
=
−272
−
48
x
=
−4
(2)
−0.2
(
−
x
+
9
)
=
−0.8
0.2
x
−
1.8
=
−0.8
0.2
x
=
−0.8
+
1.8
x
=
5
(3)
4
6
44
(
−
x
+
6
)
=
3
7
7
8
−
x
+
8
7
44
=
7
8
−
x
7
44
=
−
8
7
x
3
=
2
(4)
5
21
7
(
−
x
−
0.5
)
=
−
8
8
35
−
x
−
3.5
8
21
=
−
8
35
−
x
8
21
=
−
+
3.5
8
x
1
=
−
5
(5)
−
(
6
x
+
10
)
=
−16
−6
x
−
10
=
−16
−6
x
=
−16
+
10
x
=
1