[文字サイズの変更]
▼
▲
©2024 数学クラブ http://sugaku.club/
月 日( )
● 次の方程式を解きなさい
[226-00]
(1)
2
3
(
x
+
9
)
(
x
+
4
)
=
x
+
37
x
+
288
(2)
2
(
x
+
5
)
(
x
+
9
)
=
40
x
+
72
(3)
2
(
x
+
1
)
(
x
+
10
)
=
−
x
+
9
x
+
122
(4)
2
(
x
+
3
)
(
x
+
8
)
=
−2
x
+
38
x
+
54
(5)
2
10
(
x
+
7
)
(
x
+
4
)
=
7
x
+
95
x
+
262
©2024 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
3
(
x
+
9
)
(
x
+
4
)
2
=
x
+
37
x
+
288
2
3
x
+
39
x
+
108
2
=
x
+
37
x
+
288
2
2
x
+
2
x
−
180
=
0
2
(
x
+
10
)
(
x
−
9
)
=
0
x
=
−10
,
9
(2)
2
(
x
+
5
)
(
x
+
9
)
=
40
x
+
72
2
2
x
+
28
x
+
90
=
40
x
+
72
2
2
x
−
12
x
+
18
=
0
2
2
(
x
−
3
)
=
0
x
=
3
(3)
(
x
+
1
)
(
x
+
10
)
2
=
−
x
+
9
x
+
122
2
x
+
11
x
+
10
2
=
−
x
+
9
x
+
122
2
2
x
+
2
x
−
112
=
0
2
(
x
+
8
)
(
x
−
7
)
=
0
x
=
−8
,
7
(4)
(
x
+
3
)
(
x
+
8
)
2
=
−2
x
+
38
x
+
54
2
x
+
11
x
+
24
2
=
−2
x
+
38
x
+
54
2
3
x
−
27
x
−
30
=
0
3
(
x
+
1
)
(
x
−
10
)
=
0
x
=
−1
,
10
(5)
10
(
x
+
7
)
(
x
+
4
)
2
=
7
x
+
95
x
+
262
2
10
x
+
110
x
+
280
2
=
7
x
+
95
x
+
262
2
3
x
+
15
x
+
18
=
0
3
(
x
+
3
)
(
x
+
2
)
=
0
x
=
−3
,
−2