[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)
5
26
−1.3
(
5
x
+
)
=
−
3
3
(2)
5
237
(
7
x
+
1.1
)
=
3
2
(3)
−0.3
(
3
x
+
5
)
=
3.9
(4)
3
18
−
(
8
x
+
7
)
=
7
7
(5)
−4
(
0.4
x
−
10
)
=
54.4
©2026 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
5
26
−1.3
(
5
x
+
)
=
−
3
3
13
−6.5
x
−
6
26
=
−
3
−6.5
x
26
13
=
−
+
3
6
x
=
1
(2)
5
237
(
7
x
+
1.1
)
=
3
2
35
11
x
+
3
6
237
=
2
35
x
3
237
11
=
−
2
6
x
=
10
(3)
−0.3
(
3
x
+
5
)
=
3.9
−0.9
x
−
1.5
=
3.9
−0.9
x
=
3.9
+
1.5
x
=
−6
(4)
3
18
−
(
8
x
+
7
)
=
7
7
24
−
x
−
3
7
18
=
7
24
−
x
7
18
=
+
3
7
x
13
=
−
8
(5)
−4
(
0.4
x
−
10
)
=
54.4
−1.6
x
+
40
=
54.4
−1.6
x
=
54.4
−
40
x
=
−9