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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)
8
:
−6
=
x
−
5
:
3
(2)
4
:
−3
=
5
x
:
−60
(3)
2
:
−4
=
x
+
4
:
−10
(4)
−4
:
−5
=
x
−
3
:
−20
(5)
−3
:
−12
=
−1
:
x
−
2
(6)
−5
:
−4
=
−3
x
:
−48
(7)
x
+
3
:
−1
=
20
:
5
(8)
15
:
x
+
3
=
−12
:
−4
(9)
3
:
12
=
1
:
x
−
4
(10)
5
:
−20
=
−5
:
5
x
(11)
−
x
:
−12
=
−5
:
3
(12)
−4
:
−1
=
3
x
:
15
(13)
5
:
x
+
3
=
−5
:
5
(14)
1
:
−2
=
−6
:
−3
x
(15)
2
:
5
=
−16
:
−4
x
(16)
−6
:
3
x
=
−10
:
5
©2025 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
8
:
−6
=
x
−
5
:
3
−6
×
(
x
−
5
)
=
8
×
3
x
−
5
=
−4
x
=
1
(2)
4
:
−3
=
5
x
:
−60
−3
×
5
x
=
4
×
(
−60
)
x
=
16
(3)
2
:
−4
=
x
+
4
:
−10
−4
×
(
x
+
4
)
=
2
×
(
−10
)
x
+
4
=
5
x
=
1
(4)
−4
:
−5
=
x
−
3
:
−20
−5
×
(
x
−
3
)
=
−4
×
(
−20
)
x
−
3
=
−16
x
=
−13
(5)
−3
:
−12
=
−1
:
x
−
2
−3
×
(
x
−
2
)
=
−12
×
(
−1
)
x
−
2
=
−4
x
=
−2
(6)
−5
:
−4
=
−3
x
:
−48
−4
×
(
−3
)
x
=
−5
×
(
−48
)
x
=
20
(7)
x
+
3
:
−1
=
20
:
5
5
×
(
x
+
3
)
=
−
20
x
+
3
=
−4
x
=
−7
(8)
15
:
x
+
3
=
−12
:
−4
−12
×
(
x
+
3
)
=
15
×
(
−4
)
x
+
3
=
5
x
=
2
(9)
3
:
12
=
1
:
x
−
4
3
×
(
x
−
4
)
=
12
x
−
4
=
4
x
=
8
(10)
5
:
−20
=
−5
:
5
x
5
×
5
x
=
−20
×
(
−5
)
x
=
4
(11)
−
x
:
−12
=
−5
:
3
3
×
(
−1
)
x
=
−12
×
(
−5
)
x
=
−20
(12)
−4
:
−1
=
3
x
:
15
−
3
x
=
−4
×
15
x
=
20
(13)
5
:
x
+
3
=
−5
:
5
−5
×
(
x
+
3
)
=
5
×
5
x
+
3
=
−5
x
=
−8
(14)
1
:
−2
=
−6
:
−3
x
−3
x
=
−2
×
(
−6
)
x
=
−4
(15)
2
:
5
=
−16
:
−4
x
2
×
(
−4
)
x
=
5
×
(
−16
)
x
=
10
(16)
−6
:
3
x
=
−10
:
5
−10
×
3
x
=
−6
×
5
x
=
1