[文字サイズの変更]
▼
▲
©2026 数学クラブ http://sugaku.club/
月 日( )
● 次の比例式を解きなさい
[0G1-00]
(1)
−2
:
−4
=
x
−
3
:
−16
(2)
−12
:
−4
x
=
−1
:
5
(3)
3
:
12
=
4
:
2
x
(4)
50
:
5
x
=
−2
:
−5
(5)
−8
:
−4
x
=
−6
:
−9
(6)
3
:
−2
=
x
+
4
:
6
(7)
2
:
10
=
25
:
−5
x
(8)
−24
:
4
x
=
10
:
5
(9)
−3
x
:
−6
=
2
:
4
(10)
−15
:
−3
=
x
−
4
:
5
(11)
x
−
5
:
8
=
−5
:
−2
(12)
25
:
x
−
2
=
−5
:
3
(13)
−2
:
1
=
10
:
x
+
2
(14)
−1
:
−5
=
5
:
x
−
5
(15)
x
+
3
:
3
=
12
:
9
(16)
4
:
x
+
5
=
1
:
−2
©2026 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
−2
:
−4
=
x
−
3
:
−16
−4
×
(
x
−
3
)
=
−2
×
(
−16
)
x
−
3
=
−8
x
=
−5
(2)
−12
:
−4
x
=
−1
:
5
−
(
−4
)
x
=
−12
×
5
x
=
−15
(3)
3
:
12
=
4
:
2
x
3
×
2
x
=
12
×
4
x
=
8
(4)
50
:
5
x
=
−2
:
−5
−2
×
5
x
=
50
×
(
−5
)
x
=
25
(5)
−8
:
−4
x
=
−6
:
−9
−6
×
(
−4
)
x
=
−8
×
(
−9
)
x
=
3
(6)
3
:
−2
=
x
+
4
:
6
−2
×
(
x
+
4
)
=
3
×
6
x
+
4
=
−9
x
=
−13
(7)
2
:
10
=
25
:
−5
x
2
×
(
−5
)
x
=
10
×
25
x
=
−25
(8)
−24
:
4
x
=
10
:
5
10
×
4
x
=
−24
×
5
x
=
−3
(9)
−3
x
:
−6
=
2
:
4
4
×
(
−3
)
x
=
−6
×
2
x
=
1
(10)
−15
:
−3
=
x
−
4
:
5
−3
×
(
x
−
4
)
=
−15
×
5
x
−
4
=
25
x
=
29
(11)
x
−
5
:
8
=
−5
:
−2
−2
×
(
x
−
5
)
=
8
×
(
−5
)
x
−
5
=
20
x
=
25
(12)
25
:
x
−
2
=
−5
:
3
−5
×
(
x
−
2
)
=
25
×
3
x
−
2
=
−15
x
=
−13
(13)
−2
:
1
=
10
:
x
+
2
−2
×
(
x
+
2
)
=
10
x
+
2
=
−5
x
=
−7
(14)
−1
:
−5
=
5
:
x
−
5
−
(
x
−
5
)
=
−5
×
5
x
−
5
=
25
x
=
30
(15)
x
+
3
:
3
=
12
:
9
9
×
(
x
+
3
)
=
3
×
12
x
+
3
=
4
x
=
1
(16)
4
:
x
+
5
=
1
:
−2
x
+
5
=
4
×
(
−2
)
x
+
5
=
−8
x
=
−13