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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
(
0.6
x
+
0.9
)
=
−16.8
(2)
−0.6
(
3
x
−
5
)
=
4.8
(3)
1
6
(
4
x
+
10
)
=
7
7
(4)
−0.3
(
−6
x
+
3
)
=
−17.1
(5)
5
(
−0.5
x
+
9
)
=
48.75
©2026 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
−8
(
0.6
x
+
0.9
)
=
−16.8
−4.8
x
−
7.2
=
−16.8
−4.8
x
=
−16.8
+
7.2
x
=
2
(2)
−0.6
(
3
x
−
5
)
=
4.8
−1.8
x
+
3
=
4.8
−1.8
x
=
4.8
−
3
x
=
−1
(3)
1
6
(
4
x
+
10
)
=
7
7
4
10
x
+
7
7
6
=
7
4
x
7
6
10
=
−
7
7
x
=
−1
(4)
−0.3
(
−6
x
+
3
)
=
−17.1
1.8
x
−
0.9
=
−17.1
1.8
x
=
−17.1
+
0.9
x
=
−9
(5)
5
(
−0.5
x
+
9
)
=
48.75
−2.5
x
+
45
=
48.75
−2.5
x
=
48.75
−
45
x
=
−1.5