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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)
−24
:
−3
x
=
6
:
3
(2)
24
:
−4
x
=
−4
:
2
(3)
6
:
15
=
6
:
3
x
(4)
−12
:
4
x
=
−15
:
−5
(5)
−15
:
5
=
−6
:
−2
x
(6)
5
:
15
=
−
x
:
12
(7)
3
:
−3
x
=
1
:
−1
(8)
−4
:
−20
=
3
:
x
−
1
(9)
−2
:
x
+
2
=
10
:
20
(10)
5
:
x
−
3
=
−5
:
−25
(11)
30
:
5
x
=
−6
:
3
(12)
−
x
:
−3
=
−1
:
1
(13)
16
:
−4
=
4
:
x
−
1
(14)
8
:
x
−
4
=
−4
:
−2
(15)
−8
:
x
−
3
=
−2
:
−1
(16)
−9
:
3
=
3
x
:
−3
©2026 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
−24
:
−3
x
=
6
:
3
6
×
(
−3
)
x
=
−24
×
3
x
=
4
(2)
24
:
−4
x
=
−4
:
2
−4
×
(
−4
)
x
=
24
×
2
x
=
3
(3)
6
:
15
=
6
:
3
x
6
×
3
x
=
15
×
6
x
=
5
(4)
−12
:
4
x
=
−15
:
−5
−15
×
4
x
=
−12
×
(
−5
)
x
=
−1
(5)
−15
:
5
=
−6
:
−2
x
−15
×
(
−2
)
x
=
5
×
(
−6
)
x
=
−1
(6)
5
:
15
=
−
x
:
12
15
×
(
−1
)
x
=
5
×
12
x
=
−4
(7)
3
:
−3
x
=
1
:
−1
−3
x
=
3
×
(
−1
)
x
=
1
(8)
−4
:
−20
=
3
:
x
−
1
−4
×
(
x
−
1
)
=
−20
×
3
x
−
1
=
15
x
=
16
(9)
−2
:
x
+
2
=
10
:
20
10
×
(
x
+
2
)
=
−2
×
20
x
+
2
=
−4
x
=
−6
(10)
5
:
x
−
3
=
−5
:
−25
−5
×
(
x
−
3
)
=
5
×
(
−25
)
x
−
3
=
25
x
=
28
(11)
30
:
5
x
=
−6
:
3
−6
×
5
x
=
30
×
3
x
=
−3
(12)
−
x
:
−3
=
−1
:
1
−1
x
=
−3
×
(
−1
)
x
=
−3
(13)
16
:
−4
=
4
:
x
−
1
16
×
(
x
−
1
)
=
−4
×
4
x
−
1
=
−1
x
=
0
(14)
8
:
x
−
4
=
−4
:
−2
−4
×
(
x
−
4
)
=
8
×
(
−2
)
x
−
4
=
4
x
=
8
(15)
−8
:
x
−
3
=
−2
:
−1
−2
×
(
x
−
3
)
=
−8
×
(
−1
)
x
−
3
=
−4
x
=
−1
(16)
−9
:
3
=
3
x
:
−3
3
×
3
x
=
−9
×
(
−3
)
x
=
3