[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)
5
:
x
−
4
=
3
:
−3
(2)
−3
:
x
+
5
=
−12
:
−16
(3)
−5
:
x
+
3
=
5
:
1
(4)
−3
:
3
=
−4
:
−4
x
(5)
−10
:
−2
=
40
:
4
x
(6)
4
:
1
=
−8
:
x
+
4
(7)
−12
:
x
+
2
=
3
:
5
(8)
x
+
3
:
3
=
−20
:
4
(9)
−
x
:
6
=
−4
:
3
(10)
4
:
5
=
x
+
3
:
−20
(11)
−60
:
5
x
=
20
:
−5
(12)
5
:
10
=
x
+
5
:
−8
(13)
−4
:
x
+
5
=
−5
:
25
(14)
x
+
3
:
4
=
12
:
−3
(15)
−20
:
x
−
5
=
8
:
−2
(16)
x
−
2
:
−1
=
20
:
−5
©2026 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
5
:
x
−
4
=
3
:
−3
3
×
(
x
−
4
)
=
5
×
(
−3
)
x
−
4
=
−5
x
=
−1
(2)
−3
:
x
+
5
=
−12
:
−16
−12
×
(
x
+
5
)
=
−3
×
(
−16
)
x
+
5
=
−4
x
=
−9
(3)
−5
:
x
+
3
=
5
:
1
5
×
(
x
+
3
)
=
−5
x
+
3
=
−1
x
=
−4
(4)
−3
:
3
=
−4
:
−4
x
−3
×
(
−4
)
x
=
3
×
(
−4
)
x
=
−1
(5)
−10
:
−2
=
40
:
4
x
−10
×
4
x
=
−2
×
40
x
=
2
(6)
4
:
1
=
−8
:
x
+
4
4
×
(
x
+
4
)
=
−8
x
+
4
=
−2
x
=
−6
(7)
−12
:
x
+
2
=
3
:
5
3
×
(
x
+
2
)
=
−12
×
5
x
+
2
=
−20
x
=
−22
(8)
x
+
3
:
3
=
−20
:
4
4
×
(
x
+
3
)
=
3
×
(
−20
)
x
+
3
=
−15
x
=
−18
(9)
−
x
:
6
=
−4
:
3
3
×
(
−1
)
x
=
6
×
(
−4
)
x
=
8
(10)
4
:
5
=
x
+
3
:
−20
5
×
(
x
+
3
)
=
4
×
(
−20
)
x
+
3
=
−16
x
=
−19
(11)
−60
:
5
x
=
20
:
−5
20
×
5
x
=
−60
×
(
−5
)
x
=
3
(12)
5
:
10
=
x
+
5
:
−8
10
×
(
x
+
5
)
=
5
×
(
−8
)
x
+
5
=
−4
x
=
−9
(13)
−4
:
x
+
5
=
−5
:
25
−5
×
(
x
+
5
)
=
−4
×
25
x
+
5
=
20
x
=
15
(14)
x
+
3
:
4
=
12
:
−3
−3
×
(
x
+
3
)
=
4
×
12
x
+
3
=
−16
x
=
−19
(15)
−20
:
x
−
5
=
8
:
−2
8
×
(
x
−
5
)
=
−20
×
(
−2
)
x
−
5
=
5
x
=
10
(16)
x
−
2
:
−1
=
20
:
−5
−5
×
(
x
−
2
)
=
−
20
x
−
2
=
4
x
=
6