[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
(
x
+
1.2
)
=
−44
(2)
2
(
0.9
x
−
9
)
=
−10.8
(3)
11
55
(
x
+
5
)
=
8
6
(4)
5
1
23
(
−
x
−
)
=
−
3
2
6
(5)
−8
(
−6
x
+
2
)
=
44
©2026 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
5
(
x
+
1.2
)
=
−44
5
x
+
6
=
−44
5
x
=
−44
−
6
x
=
−10
(2)
2
(
0.9
x
−
9
)
=
−10.8
1.8
x
−
18
=
−10.8
1.8
x
=
−10.8
+
18
x
=
4
(3)
11
55
(
x
+
5
)
=
8
6
11
55
x
+
8
8
55
=
6
11
x
8
55
55
=
−
6
8
x
5
=
3
(4)
5
1
23
(
−
x
−
)
=
−
3
2
6
5
5
−
x
−
3
6
23
=
−
6
5
−
x
3
23
5
=
−
+
6
6
x
9
=
5
(5)
−8
(
−6
x
+
2
)
=
44
48
x
−
16
=
44
48
x
=
44
+
16
x
5
=
4