[文字サイズの変更]
▼
▲
©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)
−10
(
8
x
+
0.4
)
=
52
(2)
1
58
0.4
(
8
x
+
)
=
3
3
(3)
2
532
−4
(
−9
x
+
)
=
9
9
(4)
9
333
9
(
−2
x
+
)
=
7
7
(5)
9
178
4
(
1.6
x
−
)
=
−
10
5
©2026 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
−10
(
8
x
+
0.4
)
=
52
−80
x
−
4
=
52
−80
x
=
52
+
4
x
7
=
−
10
(2)
1
58
0.4
(
8
x
+
)
=
3
3
2
3.2
x
+
15
58
=
3
3.2
x
58
2
=
−
3
15
x
=
6
(3)
2
532
−4
(
−9
x
+
)
=
9
9
8
36
x
−
9
532
=
9
36
x
532
8
=
+
9
9
x
5
=
3
(4)
9
333
9
(
−2
x
+
)
=
7
7
81
−18
x
+
7
333
=
7
−18
x
333
81
=
−
7
7
x
=
−2
(5)
9
178
4
(
1.6
x
−
)
=
−
10
5
18
6.4
x
−
5
178
=
−
5
6.4
x
178
18
=
−
+
5
5
x
=
−5