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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)
6
:
−4
=
x
−
2
:
−2
(2)
6
:
3
=
x
−
1
:
−5
(3)
−60
:
4
x
=
−25
:
5
(4)
12
:
x
−
5
=
3
:
5
(5)
12
:
3
x
=
−4
:
−1
(6)
36
:
−3
x
=
3
:
2
(7)
−5
:
−4
=
−4
x
:
−16
(8)
10
:
−15
=
−2
:
x
+
5
(9)
−5
:
−2
=
x
+
3
:
4
(10)
−15
:
5
=
x
−
5
:
−4
(11)
6
:
x
−
1
=
9
:
−3
(12)
4
:
8
=
3
x
:
30
(13)
2
:
x
+
2
=
4
:
2
(14)
x
+
5
:
5
=
4
:
−4
(15)
−3
:
3
=
−4
x
:
−4
(16)
−15
:
−20
=
4
x
:
−16
©2026 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
6
:
−4
=
x
−
2
:
−2
−4
×
(
x
−
2
)
=
6
×
(
−2
)
x
−
2
=
3
x
=
5
(2)
6
:
3
=
x
−
1
:
−5
3
×
(
x
−
1
)
=
6
×
(
−5
)
x
−
1
=
−10
x
=
−9
(3)
−60
:
4
x
=
−25
:
5
−25
×
4
x
=
−60
×
5
x
=
3
(4)
12
:
x
−
5
=
3
:
5
3
×
(
x
−
5
)
=
12
×
5
x
−
5
=
20
x
=
25
(5)
12
:
3
x
=
−4
:
−1
−4
×
3
x
=
12
×
(
−1
)
x
=
1
(6)
36
:
−3
x
=
3
:
2
3
×
(
−3
)
x
=
36
×
2
x
=
−8
(7)
−5
:
−4
=
−4
x
:
−16
−4
×
(
−4
)
x
=
−5
×
(
−16
)
x
=
5
(8)
10
:
−15
=
−2
:
x
+
5
10
×
(
x
+
5
)
=
−15
×
(
−2
)
x
+
5
=
3
x
=
−2
(9)
−5
:
−2
=
x
+
3
:
4
−2
×
(
x
+
3
)
=
−5
×
4
x
+
3
=
10
x
=
7
(10)
−15
:
5
=
x
−
5
:
−4
5
×
(
x
−
5
)
=
−15
×
(
−4
)
x
−
5
=
12
x
=
17
(11)
6
:
x
−
1
=
9
:
−3
9
×
(
x
−
1
)
=
6
×
(
−3
)
x
−
1
=
−2
x
=
−1
(12)
4
:
8
=
3
x
:
30
8
×
3
x
=
4
×
30
x
=
5
(13)
2
:
x
+
2
=
4
:
2
4
×
(
x
+
2
)
=
2
×
2
x
+
2
=
1
x
=
−1
(14)
x
+
5
:
5
=
4
:
−4
−4
×
(
x
+
5
)
=
5
×
4
x
+
5
=
−5
x
=
−10
(15)
−3
:
3
=
−4
x
:
−4
3
×
(
−4
)
x
=
−3
×
(
−4
)
x
=
−1
(16)
−15
:
−20
=
4
x
:
−16
−20
×
4
x
=
−15
×
(
−16
)
x
=
−3