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©2025 数学クラブ http://sugaku.club/
月 日( )
● 次の比例式を解きなさい
[0G1-00]
(1)
4
:
−4
=
x
−
3
:
−5
(2)
x
−
4
:
2
=
4
:
−8
(3)
3
:
−3
=
−45
:
3
x
(4)
−12
:
−3
x
=
−2
:
−3
(5)
2
:
−2
=
5
:
x
−
3
(6)
x
−
5
:
2
=
6
:
−4
(7)
−8
:
12
=
x
+
4
:
3
(8)
−20
:
−16
=
−2
x
:
8
(9)
12
:
−9
=
16
:
4
x
(10)
−4
:
1
=
−5
x
:
20
(11)
−5
:
x
−
1
=
15
:
−3
(12)
−
x
:
−1
=
−10
:
−5
(13)
−8
:
x
+
5
=
−4
:
−1
(14)
−3
:
3
=
20
:
−5
x
(15)
2
:
4
=
−4
:
−4
x
(16)
4
x
:
−60
=
1
:
−3
©2025 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
4
:
−4
=
x
−
3
:
−5
−4
×
(
x
−
3
)
=
4
×
(
−5
)
x
−
3
=
5
x
=
8
(2)
x
−
4
:
2
=
4
:
−8
−8
×
(
x
−
4
)
=
2
×
4
x
−
4
=
−1
x
=
3
(3)
3
:
−3
=
−45
:
3
x
3
×
3
x
=
−3
×
(
−45
)
x
=
15
(4)
−12
:
−3
x
=
−2
:
−3
−2
×
(
−3
)
x
=
−12
×
(
−3
)
x
=
6
(5)
2
:
−2
=
5
:
x
−
3
2
×
(
x
−
3
)
=
−2
×
5
x
−
3
=
−5
x
=
−2
(6)
x
−
5
:
2
=
6
:
−4
−4
×
(
x
−
5
)
=
2
×
6
x
−
5
=
−3
x
=
2
(7)
−8
:
12
=
x
+
4
:
3
12
×
(
x
+
4
)
=
−8
×
3
x
+
4
=
−2
x
=
−6
(8)
−20
:
−16
=
−2
x
:
8
−16
×
(
−2
)
x
=
−20
×
8
x
=
−5
(9)
12
:
−9
=
16
:
4
x
12
×
4
x
=
−9
×
16
x
=
−3
(10)
−4
:
1
=
−5
x
:
20
−5
x
=
−4
×
20
x
=
16
(11)
−5
:
x
−
1
=
15
:
−3
15
×
(
x
−
1
)
=
−5
×
(
−3
)
x
−
1
=
1
x
=
2
(12)
−
x
:
−1
=
−10
:
−5
−5
×
(
−1
)
x
=
−
(
−10
)
x
=
2
(13)
−8
:
x
+
5
=
−4
:
−1
−4
×
(
x
+
5
)
=
−8
×
(
−1
)
x
+
5
=
−2
x
=
−7
(14)
−3
:
3
=
20
:
−5
x
−3
×
(
−5
)
x
=
3
×
20
x
=
4
(15)
2
:
4
=
−4
:
−4
x
2
×
(
−4
)
x
=
4
×
(
−4
)
x
=
2
(16)
4
x
:
−60
=
1
:
−3
−3
×
4
x
=
−60
x
=
5