[文字サイズの変更]
▼
▲
©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
:
x
+
2
=
−2
:
−1
(2)
−3
:
3
=
5
:
−
x
(3)
−3
:
−9
=
3
x
:
−9
(4)
−40
:
2
x
=
−5
:
−3
(5)
2
:
x
−
5
=
4
:
2
(6)
−2
x
:
−8
=
−8
:
−2
(7)
−3
:
x
−
4
=
15
:
−10
(8)
100
:
−5
x
=
5
:
3
(9)
25
:
5
=
2
x
:
−6
(10)
5
:
10
=
3
:
x
−
1
(11)
x
+
3
:
4
=
−1
:
−2
(12)
x
+
2
:
20
=
−1
:
−4
(13)
−3
x
:
−12
=
−15
:
5
(14)
−5
x
:
5
=
3
:
1
(15)
6
:
−12
=
−2
:
x
+
4
(16)
−2
x
:
16
=
5
:
−2
©2025 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
−4
:
x
+
2
=
−2
:
−1
−2
×
(
x
+
2
)
=
−4
×
(
−1
)
x
+
2
=
−2
x
=
−4
(2)
−3
:
3
=
5
:
−
x
−3
×
(
−1
)
x
=
3
×
5
x
=
5
(3)
−3
:
−9
=
3
x
:
−9
−9
×
3
x
=
−3
×
(
−9
)
x
=
−1
(4)
−40
:
2
x
=
−5
:
−3
−5
×
2
x
=
−40
×
(
−3
)
x
=
−12
(5)
2
:
x
−
5
=
4
:
2
4
×
(
x
−
5
)
=
2
×
2
x
−
5
=
1
x
=
6
(6)
−2
x
:
−8
=
−8
:
−2
−2
×
(
−2
)
x
=
−8
×
(
−8
)
x
=
16
(7)
−3
:
x
−
4
=
15
:
−10
15
×
(
x
−
4
)
=
−3
×
(
−10
)
x
−
4
=
2
x
=
6
(8)
100
:
−5
x
=
5
:
3
5
×
(
−5
)
x
=
100
×
3
x
=
−12
(9)
25
:
5
=
2
x
:
−6
5
×
2
x
=
25
×
(
−6
)
x
=
−15
(10)
5
:
10
=
3
:
x
−
1
5
×
(
x
−
1
)
=
10
×
3
x
−
1
=
6
x
=
7
(11)
x
+
3
:
4
=
−1
:
−2
−2
×
(
x
+
3
)
=
4
×
(
−1
)
x
+
3
=
2
x
=
−1
(12)
x
+
2
:
20
=
−1
:
−4
−4
×
(
x
+
2
)
=
20
×
(
−1
)
x
+
2
=
5
x
=
3
(13)
−3
x
:
−12
=
−15
:
5
5
×
(
−3
)
x
=
−12
×
(
−15
)
x
=
−12
(14)
−5
x
:
5
=
3
:
1
−5
x
=
5
×
3
x
=
−3
(15)
6
:
−12
=
−2
:
x
+
4
6
×
(
x
+
4
)
=
−12
×
(
−2
)
x
+
4
=
4
x
=
0
(16)
−2
x
:
16
=
5
:
−2
−2
×
(
−2
)
x
=
16
×
5
x
=
20