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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)
3
:
−3
=
2
x
:
−4
(2)
4
:
5
=
60
:
−5
x
(3)
6
:
2
=
−3
:
x
−
5
(4)
5
:
x
−
5
=
3
:
−3
(5)
−3
:
x
−
1
=
−12
:
16
(6)
5
:
−5
=
x
+
4
:
−20
(7)
−4
:
6
=
5
x
:
−15
(8)
3
:
−9
=
−8
:
4
x
(9)
−10
:
5
=
−3
x
:
−12
(10)
−8
:
−4
x
=
−3
:
6
(11)
4
:
x
−
5
=
−16
:
−4
(12)
4
:
x
+
4
=
16
:
−20
(13)
2
:
8
=
1
:
x
−
4
(14)
−4
x
:
24
=
−5
:
−3
(15)
−2
:
−8
=
x
+
5
:
16
(16)
2
:
−
x
=
−1
:
−2
©2026 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
3
:
−3
=
2
x
:
−4
−3
×
2
x
=
3
×
(
−4
)
x
=
2
(2)
4
:
5
=
60
:
−5
x
4
×
(
−5
)
x
=
5
×
60
x
=
−15
(3)
6
:
2
=
−3
:
x
−
5
6
×
(
x
−
5
)
=
2
×
(
−3
)
x
−
5
=
−1
x
=
4
(4)
5
:
x
−
5
=
3
:
−3
3
×
(
x
−
5
)
=
5
×
(
−3
)
x
−
5
=
−5
x
=
0
(5)
−3
:
x
−
1
=
−12
:
16
−12
×
(
x
−
1
)
=
−3
×
16
x
−
1
=
4
x
=
5
(6)
5
:
−5
=
x
+
4
:
−20
−5
×
(
x
+
4
)
=
5
×
(
−20
)
x
+
4
=
20
x
=
16
(7)
−4
:
6
=
5
x
:
−15
6
×
5
x
=
−4
×
(
−15
)
x
=
2
(8)
3
:
−9
=
−8
:
4
x
3
×
4
x
=
−9
×
(
−8
)
x
=
6
(9)
−10
:
5
=
−3
x
:
−12
5
×
(
−3
)
x
=
−10
×
(
−12
)
x
=
−8
(10)
−8
:
−4
x
=
−3
:
6
−3
×
(
−4
)
x
=
−8
×
6
x
=
−4
(11)
4
:
x
−
5
=
−16
:
−4
−16
×
(
x
−
5
)
=
4
×
(
−4
)
x
−
5
=
1
x
=
6
(12)
4
:
x
+
4
=
16
:
−20
16
×
(
x
+
4
)
=
4
×
(
−20
)
x
+
4
=
−5
x
=
−9
(13)
2
:
8
=
1
:
x
−
4
2
×
(
x
−
4
)
=
8
x
−
4
=
4
x
=
8
(14)
−4
x
:
24
=
−5
:
−3
−3
×
(
−4
)
x
=
24
×
(
−5
)
x
=
−10
(15)
−2
:
−8
=
x
+
5
:
16
−8
×
(
x
+
5
)
=
−2
×
16
x
+
5
=
4
x
=
−1
(16)
2
:
−
x
=
−1
:
−2
x
=
2
×
(
−2
)
x
=
−4