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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)
−1.5
(
−
x
+
4
)
=
−16.5
(2)
1.6
(
4
x
+
3
)
=
8
(3)
3
(
−8
x
−
1
)
=
−34.2
(4)
3
21
−
(
−0.6
x
+
)
=
−
2
10
(5)
7
110
−10
(
0.1
x
+
)
=
−
6
9
©2026 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
−1.5
(
−
x
+
4
)
=
−16.5
1.5
x
−
6
=
−16.5
1.5
x
=
−16.5
+
6
x
=
−7
(2)
1.6
(
4
x
+
3
)
=
8
6.4
x
+
4.8
=
8
6.4
x
=
8
−
4.8
x
=
0.5
(3)
3
(
−8
x
−
1
)
=
−34.2
−24
x
−
3
=
−34.2
−24
x
=
−34.2
+
3
x
=
1.3
(4)
3
21
−
(
−0.6
x
+
)
=
−
2
10
3
0.6
x
−
2
21
=
−
10
0.6
x
21
3
=
−
+
10
2
x
=
−1
(5)
7
110
−10
(
0.1
x
+
)
=
−
6
9
35
−
x
−
3
110
=
−
9
−
x
110
35
=
−
+
9
3
x
5
=
9