[文字サイズの変更]
▼
▲
©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
:
−12
=
−2
x
:
6
(2)
−4
:
−16
=
−4
x
:
80
(3)
−9
:
3
=
x
+
4
:
−5
(4)
−2
x
:
−40
=
−2
:
−8
(5)
5
:
2
=
125
:
5
x
(6)
5
x
:
−10
=
8
:
2
(7)
8
:
x
+
4
=
−12
:
−3
(8)
−5
:
x
+
3
=
15
:
−6
(9)
−3
:
12
=
−10
:
−2
x
(10)
−4
:
−16
=
2
x
:
−16
(11)
−3
:
x
+
4
=
2
:
−4
(12)
−2
:
8
=
4
:
4
x
(13)
−3
:
−5
=
5
x
:
75
(14)
−16
:
−12
=
−4
x
:
−12
(15)
−1
:
−4
=
3
:
x
−
4
(16)
x
−
4
:
−12
=
−1
:
3
©2026 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
−4
:
−12
=
−2
x
:
6
−12
×
(
−2
)
x
=
−4
×
6
x
=
−1
(2)
−4
:
−16
=
−4
x
:
80
−16
×
(
−4
)
x
=
−4
×
80
x
=
−5
(3)
−9
:
3
=
x
+
4
:
−5
3
×
(
x
+
4
)
=
−9
×
(
−5
)
x
+
4
=
15
x
=
11
(4)
−2
x
:
−40
=
−2
:
−8
−8
×
(
−2
)
x
=
−40
×
(
−2
)
x
=
5
(5)
5
:
2
=
125
:
5
x
5
×
5
x
=
2
×
125
x
=
10
(6)
5
x
:
−10
=
8
:
2
2
×
5
x
=
−10
×
8
x
=
−8
(7)
8
:
x
+
4
=
−12
:
−3
−12
×
(
x
+
4
)
=
8
×
(
−3
)
x
+
4
=
2
x
=
−2
(8)
−5
:
x
+
3
=
15
:
−6
15
×
(
x
+
3
)
=
−5
×
(
−6
)
x
+
3
=
2
x
=
−1
(9)
−3
:
12
=
−10
:
−2
x
−3
×
(
−2
)
x
=
12
×
(
−10
)
x
=
−20
(10)
−4
:
−16
=
2
x
:
−16
−16
×
2
x
=
−4
×
(
−16
)
x
=
−2
(11)
−3
:
x
+
4
=
2
:
−4
2
×
(
x
+
4
)
=
−3
×
(
−4
)
x
+
4
=
6
x
=
2
(12)
−2
:
8
=
4
:
4
x
−2
×
4
x
=
8
×
4
x
=
−4
(13)
−3
:
−5
=
5
x
:
75
−5
×
5
x
=
−3
×
75
x
=
9
(14)
−16
:
−12
=
−4
x
:
−12
−12
×
(
−4
)
x
=
−16
×
(
−12
)
x
=
4
(15)
−1
:
−4
=
3
:
x
−
4
−
(
x
−
4
)
=
−4
×
3
x
−
4
=
12
x
=
16
(16)
x
−
4
:
−12
=
−1
:
3
3
×
(
x
−
4
)
=
−12
×
(
−1
)
x
−
4
=
4
x
=
8