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©2024 数学クラブ http://sugaku.club/
月 日( )
● 次の比例式を解きなさい
[0G1-00]
(1)
3
:
x
+
2
=
−3
:
−6
(2)
−1
:
−2
=
4
:
x
−
4
(3)
−10
:
20
=
6
:
−3
x
(4)
−5
:
5
=
2
:
x
+
2
(5)
5
:
−15
=
−1
:
x
+
4
(6)
1
:
−2
=
2
:
x
+
5
(7)
20
:
x
+
4
=
5
:
−1
(8)
20
:
−5
=
−5
x
:
−25
(9)
15
:
5
x
=
−3
:
−4
(10)
−2
:
x
−
4
=
−3
:
6
(11)
−5
:
2
=
3
x
:
−18
(12)
−5
:
x
−
2
=
3
:
15
(13)
5
:
−5
=
−60
:
3
x
(14)
−20
:
4
x
=
10
:
−2
(15)
x
−
5
:
−5
=
−5
:
5
(16)
−2
:
2
=
3
:
−3
x
©2024 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
3
:
x
+
2
=
−3
:
−6
−3
×
(
x
+
2
)
=
3
×
(
−6
)
x
+
2
=
6
x
=
4
(2)
−1
:
−2
=
4
:
x
−
4
−
(
x
−
4
)
=
−2
×
4
x
−
4
=
8
x
=
12
(3)
−10
:
20
=
6
:
−3
x
−10
×
(
−3
)
x
=
20
×
6
x
=
4
(4)
−5
:
5
=
2
:
x
+
2
−5
×
(
x
+
2
)
=
5
×
2
x
+
2
=
−2
x
=
−4
(5)
5
:
−15
=
−1
:
x
+
4
5
×
(
x
+
4
)
=
−15
×
(
−1
)
x
+
4
=
3
x
=
−1
(6)
1
:
−2
=
2
:
x
+
5
x
+
5
=
−2
×
2
x
+
5
=
−4
x
=
−9
(7)
20
:
x
+
4
=
5
:
−1
5
×
(
x
+
4
)
=
20
×
(
−1
)
x
+
4
=
−4
x
=
−8
(8)
20
:
−5
=
−5
x
:
−25
−5
×
(
−5
)
x
=
20
×
(
−25
)
x
=
−20
(9)
15
:
5
x
=
−3
:
−4
−3
×
5
x
=
15
×
(
−4
)
x
=
4
(10)
−2
:
x
−
4
=
−3
:
6
−3
×
(
x
−
4
)
=
−2
×
6
x
−
4
=
4
x
=
8
(11)
−5
:
2
=
3
x
:
−18
2
×
3
x
=
−5
×
(
−18
)
x
=
15
(12)
−5
:
x
−
2
=
3
:
15
3
×
(
x
−
2
)
=
−5
×
15
x
−
2
=
−25
x
=
−23
(13)
5
:
−5
=
−60
:
3
x
5
×
3
x
=
−5
×
(
−60
)
x
=
20
(14)
−20
:
4
x
=
10
:
−2
10
×
4
x
=
−20
×
(
−2
)
x
=
1
(15)
x
−
5
:
−5
=
−5
:
5
5
×
(
x
−
5
)
=
−5
×
(
−5
)
x
−
5
=
5
x
=
10
(16)
−2
:
2
=
3
:
−3
x
−2
×
(
−3
)
x
=
2
×
3
x
=
1