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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)
−5
x
:
5
=
8
:
4
(2)
−36
:
3
x
=
4
:
−1
(3)
−4
:
x
−
3
=
−8
:
−2
(4)
−15
:
25
=
12
:
4
x
(5)
−4
:
1
=
−60
:
−3
x
(6)
−10
:
−2
x
=
3
:
15
(7)
−1
:
x
−
5
=
−3
:
15
(8)
−5
x
:
−20
=
15
:
5
(9)
−3
:
6
=
−5
:
5
x
(10)
−4
:
x
+
4
=
−2
:
6
(11)
5
x
:
−10
=
6
:
3
(12)
3
:
x
+
2
=
−4
:
−20
(13)
−2
:
x
+
2
=
2
:
3
(14)
−3
x
:
−36
=
−5
:
20
(15)
−2
:
−4
=
−12
:
3
x
(16)
−1
:
−5
=
−
x
:
−5
©2026 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
−5
x
:
5
=
8
:
4
4
×
(
−5
)
x
=
5
×
8
x
=
−2
(2)
−36
:
3
x
=
4
:
−1
4
×
3
x
=
−36
×
(
−1
)
x
=
3
(3)
−4
:
x
−
3
=
−8
:
−2
−8
×
(
x
−
3
)
=
−4
×
(
−2
)
x
−
3
=
−1
x
=
2
(4)
−15
:
25
=
12
:
4
x
−15
×
4
x
=
25
×
12
x
=
−5
(5)
−4
:
1
=
−60
:
−3
x
−4
×
(
−3
)
x
=
−60
x
=
−5
(6)
−10
:
−2
x
=
3
:
15
3
×
(
−2
)
x
=
−10
×
15
x
=
25
(7)
−1
:
x
−
5
=
−3
:
15
−3
×
(
x
−
5
)
=
−
15
x
−
5
=
5
x
=
10
(8)
−5
x
:
−20
=
15
:
5
5
×
(
−5
)
x
=
−20
×
15
x
=
12
(9)
−3
:
6
=
−5
:
5
x
−3
×
5
x
=
6
×
(
−5
)
x
=
2
(10)
−4
:
x
+
4
=
−2
:
6
−2
×
(
x
+
4
)
=
−4
×
6
x
+
4
=
12
x
=
8
(11)
5
x
:
−10
=
6
:
3
3
×
5
x
=
−10
×
6
x
=
−4
(12)
3
:
x
+
2
=
−4
:
−20
−4
×
(
x
+
2
)
=
3
×
(
−20
)
x
+
2
=
15
x
=
13
(13)
−2
:
x
+
2
=
2
:
3
2
×
(
x
+
2
)
=
−2
×
3
x
+
2
=
−3
x
=
−5
(14)
−3
x
:
−36
=
−5
:
20
20
×
(
−3
)
x
=
−36
×
(
−5
)
x
=
−3
(15)
−2
:
−4
=
−12
:
3
x
−2
×
3
x
=
−4
×
(
−12
)
x
=
−8
(16)
−1
:
−5
=
−
x
:
−5
−5
×
(
−1
)
x
=
−
(
−5
)
x
=
1