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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)
−10
:
x
−
1
=
−2
:
−1
(2)
9
:
−3
x
=
9
:
6
(3)
−1
:
−4
=
x
−
3
:
4
(4)
1
:
−2
=
x
−
3
:
−4
(5)
−27
:
3
x
=
−3
:
3
(6)
−4
:
x
−
5
=
3
:
−9
(7)
−4
:
−20
=
x
−
3
:
−25
(8)
x
+
5
:
1
=
−20
:
5
(9)
3
x
:
3
=
−4
:
−2
(10)
−5
:
x
+
2
=
−2
:
−8
(11)
−6
:
x
−
2
=
2
:
−1
(12)
x
+
5
:
1
=
8
:
2
(13)
3
x
:
18
=
4
:
−8
(14)
3
:
4
=
−6
:
x
+
4
(15)
x
+
2
:
−6
=
3
:
−2
(16)
−3
x
:
−15
=
6
:
−3
©2026 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
−10
:
x
−
1
=
−2
:
−1
−2
×
(
x
−
1
)
=
−10
×
(
−1
)
x
−
1
=
−5
x
=
−4
(2)
9
:
−3
x
=
9
:
6
9
×
(
−3
)
x
=
9
×
6
x
=
−2
(3)
−1
:
−4
=
x
−
3
:
4
−4
×
(
x
−
3
)
=
−
4
x
−
3
=
1
x
=
4
(4)
1
:
−2
=
x
−
3
:
−4
−2
×
(
x
−
3
)
=
−4
x
−
3
=
2
x
=
5
(5)
−27
:
3
x
=
−3
:
3
−3
×
3
x
=
−27
×
3
x
=
9
(6)
−4
:
x
−
5
=
3
:
−9
3
×
(
x
−
5
)
=
−4
×
(
−9
)
x
−
5
=
12
x
=
17
(7)
−4
:
−20
=
x
−
3
:
−25
−20
×
(
x
−
3
)
=
−4
×
(
−25
)
x
−
3
=
−5
x
=
−2
(8)
x
+
5
:
1
=
−20
:
5
5
×
(
x
+
5
)
=
−20
x
+
5
=
−4
x
=
−9
(9)
3
x
:
3
=
−4
:
−2
−2
×
3
x
=
3
×
(
−4
)
x
=
2
(10)
−5
:
x
+
2
=
−2
:
−8
−2
×
(
x
+
2
)
=
−5
×
(
−8
)
x
+
2
=
−20
x
=
−22
(11)
−6
:
x
−
2
=
2
:
−1
2
×
(
x
−
2
)
=
−6
×
(
−1
)
x
−
2
=
3
x
=
5
(12)
x
+
5
:
1
=
8
:
2
2
×
(
x
+
5
)
=
8
x
+
5
=
4
x
=
−1
(13)
3
x
:
18
=
4
:
−8
−8
×
3
x
=
18
×
4
x
=
−3
(14)
3
:
4
=
−6
:
x
+
4
3
×
(
x
+
4
)
=
4
×
(
−6
)
x
+
4
=
−8
x
=
−12
(15)
x
+
2
:
−6
=
3
:
−2
−2
×
(
x
+
2
)
=
−6
×
3
x
+
2
=
9
x
=
7
(16)
−3
x
:
−15
=
6
:
−3
−3
×
(
−3
)
x
=
−15
×
6
x
=
−10