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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)
−4
:
1
=
−12
:
−3
x
(2)
−16
:
−4
=
−20
:
x
+
3
(3)
1
:
3
=
−1
:
x
+
3
(4)
−15
:
x
+
2
=
3
:
−1
(5)
4
:
1
=
−48
:
−4
x
(6)
4
x
:
24
=
2
:
4
(7)
−12
:
4
x
=
−2
:
2
(8)
4
:
−2
=
4
x
:
−32
(9)
−5
:
−3
=
−4
x
:
36
(10)
−1
:
2
=
−2
x
:
−12
(11)
25
:
−5
x
=
2
:
−2
(12)
8
:
−4
x
=
−1
:
−4
(13)
2
:
3
=
x
+
2
:
−6
(14)
20
:
−5
x
=
−3
:
−9
(15)
10
:
5
=
4
:
−2
x
(16)
4
:
−2
x
=
−4
:
−6
©2026 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
−4
:
1
=
−12
:
−3
x
−4
×
(
−3
)
x
=
−12
x
=
−1
(2)
−16
:
−4
=
−20
:
x
+
3
−16
×
(
x
+
3
)
=
−4
×
(
−20
)
x
+
3
=
−5
x
=
−8
(3)
1
:
3
=
−1
:
x
+
3
x
+
3
=
3
×
(
−1
)
x
+
3
=
−3
x
=
−6
(4)
−15
:
x
+
2
=
3
:
−1
3
×
(
x
+
2
)
=
−15
×
(
−1
)
x
+
2
=
5
x
=
3
(5)
4
:
1
=
−48
:
−4
x
4
×
(
−4
)
x
=
−48
x
=
3
(6)
4
x
:
24
=
2
:
4
4
×
4
x
=
24
×
2
x
=
3
(7)
−12
:
4
x
=
−2
:
2
−2
×
4
x
=
−12
×
2
x
=
3
(8)
4
:
−2
=
4
x
:
−32
−2
×
4
x
=
4
×
(
−32
)
x
=
16
(9)
−5
:
−3
=
−4
x
:
36
−3
×
(
−4
)
x
=
−5
×
36
x
=
−15
(10)
−1
:
2
=
−2
x
:
−12
2
×
(
−2
)
x
=
−
(
−12
)
x
=
−3
(11)
25
:
−5
x
=
2
:
−2
2
×
(
−5
)
x
=
25
×
(
−2
)
x
=
5
(12)
8
:
−4
x
=
−1
:
−4
−
(
−4
)
x
=
8
×
(
−4
)
x
=
−8
(13)
2
:
3
=
x
+
2
:
−6
3
×
(
x
+
2
)
=
2
×
(
−6
)
x
+
2
=
−4
x
=
−6
(14)
20
:
−5
x
=
−3
:
−9
−3
×
(
−5
)
x
=
20
×
(
−9
)
x
=
−12
(15)
10
:
5
=
4
:
−2
x
10
×
(
−2
)
x
=
5
×
4
x
=
−1
(16)
4
:
−2
x
=
−4
:
−6
−4
×
(
−2
)
x
=
4
×
(
−6
)
x
=
−3