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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)
−4
:
−2
=
−3
x
:
24
(2)
6
:
3
=
4
x
:
−16
(3)
−3
:
x
−
4
=
4
:
−8
(4)
x
−
5
:
−5
=
20
:
−4
(5)
4
:
−2
=
24
:
3
x
(6)
5
:
25
=
x
−
2
:
10
(7)
−5
:
4
=
−25
:
x
+
2
(8)
4
:
x
−
5
=
16
:
−8
(9)
9
:
−3
=
36
:
−3
x
(10)
4
:
−3
=
3
x
:
9
(11)
12
:
x
−
5
=
−8
:
2
(12)
x
−
4
:
−4
=
−20
:
−16
(13)
−1
:
3
=
10
:
−2
x
(14)
−3
x
:
−12
=
−3
:
12
(15)
−2
:
−1
=
−40
:
−5
x
(16)
3
:
x
−
3
=
12
:
−8
©2026 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
−4
:
−2
=
−3
x
:
24
−2
×
(
−3
)
x
=
−4
×
24
x
=
−16
(2)
6
:
3
=
4
x
:
−16
3
×
4
x
=
6
×
(
−16
)
x
=
−8
(3)
−3
:
x
−
4
=
4
:
−8
4
×
(
x
−
4
)
=
−3
×
(
−8
)
x
−
4
=
6
x
=
10
(4)
x
−
5
:
−5
=
20
:
−4
−4
×
(
x
−
5
)
=
−5
×
20
x
−
5
=
25
x
=
30
(5)
4
:
−2
=
24
:
3
x
4
×
3
x
=
−2
×
24
x
=
−4
(6)
5
:
25
=
x
−
2
:
10
25
×
(
x
−
2
)
=
5
×
10
x
−
2
=
2
x
=
4
(7)
−5
:
4
=
−25
:
x
+
2
−5
×
(
x
+
2
)
=
4
×
(
−25
)
x
+
2
=
20
x
=
18
(8)
4
:
x
−
5
=
16
:
−8
16
×
(
x
−
5
)
=
4
×
(
−8
)
x
−
5
=
−2
x
=
3
(9)
9
:
−3
=
36
:
−3
x
9
×
(
−3
)
x
=
−3
×
36
x
=
4
(10)
4
:
−3
=
3
x
:
9
−3
×
3
x
=
4
×
9
x
=
−4
(11)
12
:
x
−
5
=
−8
:
2
−8
×
(
x
−
5
)
=
12
×
2
x
−
5
=
−3
x
=
2
(12)
x
−
4
:
−4
=
−20
:
−16
−16
×
(
x
−
4
)
=
−4
×
(
−20
)
x
−
4
=
−5
x
=
−1
(13)
−1
:
3
=
10
:
−2
x
−
(
−2
)
x
=
3
×
10
x
=
15
(14)
−3
x
:
−12
=
−3
:
12
12
×
(
−3
)
x
=
−12
×
(
−3
)
x
=
−1
(15)
−2
:
−1
=
−40
:
−5
x
−2
×
(
−5
)
x
=
−
(
−40
)
x
=
4
(16)
3
:
x
−
3
=
12
:
−8
12
×
(
x
−
3
)
=
3
×
(
−8
)
x
−
3
=
−2
x
=
1