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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
=
−16
:
−
x
(2)
−2
:
−1
=
−24
:
3
x
(3)
−3
:
−1
=
x
+
3
:
2
(4)
−4
:
16
=
x
−
4
:
12
(5)
−4
:
−2
=
−2
:
−
x
(6)
x
+
4
:
8
=
5
:
−20
(7)
−15
:
5
=
−12
:
x
−
4
(8)
−6
:
−2
=
−36
:
−3
x
(9)
−4
x
:
−48
=
−5
:
15
(10)
−2
x
:
−2
=
−4
:
2
(11)
−8
:
4
=
−4
x
:
12
(12)
2
:
4
=
−1
:
x
−
2
(13)
1
:
−1
=
−25
:
−5
x
(14)
−4
:
−20
=
x
+
3
:
25
(15)
3
:
x
+
2
=
9
:
−6
(16)
−3
:
−9
=
−2
x
:
12
©2026 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
−4
:
1
=
−16
:
−
x
−4
×
(
−1
)
x
=
−16
x
=
−4
(2)
−2
:
−1
=
−24
:
3
x
−2
×
3
x
=
−
(
−24
)
x
=
−4
(3)
−3
:
−1
=
x
+
3
:
2
−
(
x
+
3
)
=
−3
×
2
x
+
3
=
6
x
=
3
(4)
−4
:
16
=
x
−
4
:
12
16
×
(
x
−
4
)
=
−4
×
12
x
−
4
=
−3
x
=
1
(5)
−4
:
−2
=
−2
:
−
x
−4
×
(
−1
)
x
=
−2
×
(
−2
)
x
=
1
(6)
x
+
4
:
8
=
5
:
−20
−20
×
(
x
+
4
)
=
8
×
5
x
+
4
=
−2
x
=
−6
(7)
−15
:
5
=
−12
:
x
−
4
−15
×
(
x
−
4
)
=
5
×
(
−12
)
x
−
4
=
4
x
=
8
(8)
−6
:
−2
=
−36
:
−3
x
−6
×
(
−3
)
x
=
−2
×
(
−36
)
x
=
4
(9)
−4
x
:
−48
=
−5
:
15
15
×
(
−4
)
x
=
−48
×
(
−5
)
x
=
−4
(10)
−2
x
:
−2
=
−4
:
2
2
×
(
−2
)
x
=
−2
×
(
−4
)
x
=
−2
(11)
−8
:
4
=
−4
x
:
12
4
×
(
−4
)
x
=
−8
×
12
x
=
6
(12)
2
:
4
=
−1
:
x
−
2
2
×
(
x
−
2
)
=
4
×
(
−1
)
x
−
2
=
−2
x
=
0
(13)
1
:
−1
=
−25
:
−5
x
−5
x
=
−
(
−25
)
x
=
−5
(14)
−4
:
−20
=
x
+
3
:
25
−20
×
(
x
+
3
)
=
−4
×
25
x
+
3
=
5
x
=
2
(15)
3
:
x
+
2
=
9
:
−6
9
×
(
x
+
2
)
=
3
×
(
−6
)
x
+
2
=
−2
x
=
−4
(16)
−3
:
−9
=
−2
x
:
12
−9
×
(
−2
)
x
=
−3
×
12
x
=
−2