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©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)
x
+
4
:
−1
=
3
:
1
(2)
−6
:
x
+
3
=
−2
:
2
(3)
−6
:
−15
=
3
x
:
−15
(4)
5
:
−5
=
60
:
4
x
(5)
15
:
5
x
=
15
:
5
(6)
−12
:
3
=
−16
:
x
+
4
(7)
2
x
:
−10
=
−8
:
10
(8)
20
:
−4
=
−5
x
:
5
(9)
−15
:
3
x
=
10
:
8
(10)
−9
:
−3
=
15
:
x
+
5
(11)
3
:
−9
=
4
x
:
12
(12)
−1
:
−2
=
x
−
3
:
4
(13)
6
:
x
−
5
=
4
:
2
(14)
16
:
4
x
=
−12
:
3
(15)
−3
x
:
−3
=
−16
:
−4
(16)
20
:
−4
x
=
1
:
−5
©2026 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
x
+
4
:
−1
=
3
:
1
x
+
4
=
−
3
x
+
4
=
−3
x
=
−7
(2)
−6
:
x
+
3
=
−2
:
2
−2
×
(
x
+
3
)
=
−6
×
2
x
+
3
=
6
x
=
3
(3)
−6
:
−15
=
3
x
:
−15
−15
×
3
x
=
−6
×
(
−15
)
x
=
−2
(4)
5
:
−5
=
60
:
4
x
5
×
4
x
=
−5
×
60
x
=
−15
(5)
15
:
5
x
=
15
:
5
15
×
5
x
=
15
×
5
x
=
1
(6)
−12
:
3
=
−16
:
x
+
4
−12
×
(
x
+
4
)
=
3
×
(
−16
)
x
+
4
=
4
x
=
0
(7)
2
x
:
−10
=
−8
:
10
10
×
2
x
=
−10
×
(
−8
)
x
=
4
(8)
20
:
−4
=
−5
x
:
5
−4
×
(
−5
)
x
=
20
×
5
x
=
5
(9)
−15
:
3
x
=
10
:
8
10
×
3
x
=
−15
×
8
x
=
−4
(10)
−9
:
−3
=
15
:
x
+
5
−9
×
(
x
+
5
)
=
−3
×
15
x
+
5
=
5
x
=
0
(11)
3
:
−9
=
4
x
:
12
−9
×
4
x
=
3
×
12
x
=
−1
(12)
−1
:
−2
=
x
−
3
:
4
−2
×
(
x
−
3
)
=
−
4
x
−
3
=
2
x
=
5
(13)
6
:
x
−
5
=
4
:
2
4
×
(
x
−
5
)
=
6
×
2
x
−
5
=
3
x
=
8
(14)
16
:
4
x
=
−12
:
3
−12
×
4
x
=
16
×
3
x
=
−1
(15)
−3
x
:
−3
=
−16
:
−4
−4
×
(
−3
)
x
=
−3
×
(
−16
)
x
=
4
(16)
20
:
−4
x
=
1
:
−5
−4
x
=
20
×
(
−5
)
x
=
25