[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)
11
88
(
10
x
+
7
)
=
7
7
(2)
2
(
−2
x
−
0.9
)
=
0.6
(3)
7
(
x
+
6
)
=
37.8
(4)
99
3
(
8
x
+
1.5
)
=
2
(5)
2
5
13
1
−
(
−
x
+
)
=
5
4
8
4
©2026 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
11
88
(
10
x
+
7
)
=
7
7
110
x
+
11
7
88
=
7
110
x
7
88
=
−
11
7
x
1
=
10
(2)
2
(
−2
x
−
0.9
)
=
0.6
−4
x
−
1.8
=
0.6
−4
x
=
0.6
+
1.8
x
=
−0.6
(3)
7
(
x
+
6
)
=
37.8
7
x
+
42
=
37.8
7
x
=
37.8
−
42
x
=
−0.6
(4)
99
3
(
8
x
+
1.5
)
=
2
24
x
+
4.5
99
=
2
24
x
99
=
−
4.5
2
x
15
=
8
(5)
2
5
13
1
−
(
−
x
+
)
=
5
4
8
4
1
13
x
−
2
20
1
=
4
1
x
2
1
13
=
+
4
20
x
9
=
5