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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)
−1
:
−3
=
−3
x
:
−36
(2)
−60
:
3
x
=
5
:
4
(3)
4
x
:
8
=
−2
:
1
(4)
4
:
x
+
4
=
−16
:
−12
(5)
−8
:
4
=
−2
x
:
6
(6)
5
:
−3
=
40
:
4
x
(7)
10
:
2
x
=
20
:
12
(8)
2
x
:
8
=
10
:
5
(9)
x
+
4
:
1
=
1
:
−1
(10)
−9
:
3
=
x
−
5
:
−5
(11)
5
:
−5
=
−30
:
−3
x
(12)
−4
:
−1
=
3
x
:
9
(13)
8
:
10
=
2
x
:
10
(14)
4
x
:
−80
=
−3
:
12
(15)
15
:
9
=
5
:
x
+
5
(16)
3
:
x
+
2
=
−12
:
−16
©2026 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
−1
:
−3
=
−3
x
:
−36
−3
×
(
−3
)
x
=
−
(
−36
)
x
=
4
(2)
−60
:
3
x
=
5
:
4
5
×
3
x
=
−60
×
4
x
=
−16
(3)
4
x
:
8
=
−2
:
1
4
x
=
8
×
(
−2
)
x
=
−4
(4)
4
:
x
+
4
=
−16
:
−12
−16
×
(
x
+
4
)
=
4
×
(
−12
)
x
+
4
=
3
x
=
−1
(5)
−8
:
4
=
−2
x
:
6
4
×
(
−2
)
x
=
−8
×
6
x
=
6
(6)
5
:
−3
=
40
:
4
x
5
×
4
x
=
−3
×
40
x
=
−6
(7)
10
:
2
x
=
20
:
12
20
×
2
x
=
10
×
12
x
=
3
(8)
2
x
:
8
=
10
:
5
5
×
2
x
=
8
×
10
x
=
8
(9)
x
+
4
:
1
=
1
:
−1
−
(
x
+
4
)
=
1
x
+
4
=
−1
x
=
−5
(10)
−9
:
3
=
x
−
5
:
−5
3
×
(
x
−
5
)
=
−9
×
(
−5
)
x
−
5
=
15
x
=
20
(11)
5
:
−5
=
−30
:
−3
x
5
×
(
−3
)
x
=
−5
×
(
−30
)
x
=
−10
(12)
−4
:
−1
=
3
x
:
9
−
3
x
=
−4
×
9
x
=
12
(13)
8
:
10
=
2
x
:
10
10
×
2
x
=
8
×
10
x
=
4
(14)
4
x
:
−80
=
−3
:
12
12
×
4
x
=
−80
×
(
−3
)
x
=
5
(15)
15
:
9
=
5
:
x
+
5
15
×
(
x
+
5
)
=
9
×
5
x
+
5
=
3
x
=
−2
(16)
3
:
x
+
2
=
−12
:
−16
−12
×
(
x
+
2
)
=
3
×
(
−16
)
x
+
2
=
4
x
=
2