[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)
5
:
−10
=
x
+
3
:
2
(2)
x
−
4
:
−4
=
−8
:
8
(3)
−1
:
3
=
4
x
:
36
(4)
2
:
1
=
4
:
−2
x
(5)
12
:
8
=
−3
:
x
−
1
(6)
−3
:
x
+
2
=
−1
:
1
(7)
5
:
25
=
−
x
:
−5
(8)
−9
:
−3
=
2
x
:
6
(9)
−5
x
:
15
=
−10
:
5
(10)
−20
:
5
=
−12
:
x
+
2
(11)
x
−
3
:
8
=
4
:
−16
(12)
−5
:
5
=
−5
x
:
−15
(13)
9
:
6
=
−3
:
x
−
3
(14)
x
+
2
:
16
=
−2
:
4
(15)
3
:
6
=
−2
:
x
+
4
(16)
−3
:
−4
=
−5
x
:
−40
©2025 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
5
:
−10
=
x
+
3
:
2
−10
×
(
x
+
3
)
=
5
×
2
x
+
3
=
−1
x
=
−4
(2)
x
−
4
:
−4
=
−8
:
8
8
×
(
x
−
4
)
=
−4
×
(
−8
)
x
−
4
=
4
x
=
8
(3)
−1
:
3
=
4
x
:
36
3
×
4
x
=
−
36
x
=
−3
(4)
2
:
1
=
4
:
−2
x
2
×
(
−2
)
x
=
4
x
=
−1
(5)
12
:
8
=
−3
:
x
−
1
12
×
(
x
−
1
)
=
8
×
(
−3
)
x
−
1
=
−2
x
=
−1
(6)
−3
:
x
+
2
=
−1
:
1
−
(
x
+
2
)
=
−3
x
+
2
=
3
x
=
1
(7)
5
:
25
=
−
x
:
−5
25
×
(
−1
)
x
=
5
×
(
−5
)
x
=
1
(8)
−9
:
−3
=
2
x
:
6
−3
×
2
x
=
−9
×
6
x
=
9
(9)
−5
x
:
15
=
−10
:
5
5
×
(
−5
)
x
=
15
×
(
−10
)
x
=
6
(10)
−20
:
5
=
−12
:
x
+
2
−20
×
(
x
+
2
)
=
5
×
(
−12
)
x
+
2
=
3
x
=
1
(11)
x
−
3
:
8
=
4
:
−16
−16
×
(
x
−
3
)
=
8
×
4
x
−
3
=
−2
x
=
1
(12)
−5
:
5
=
−5
x
:
−15
5
×
(
−5
)
x
=
−5
×
(
−15
)
x
=
−3
(13)
9
:
6
=
−3
:
x
−
3
9
×
(
x
−
3
)
=
6
×
(
−3
)
x
−
3
=
−2
x
=
1
(14)
x
+
2
:
16
=
−2
:
4
4
×
(
x
+
2
)
=
16
×
(
−2
)
x
+
2
=
−8
x
=
−10
(15)
3
:
6
=
−2
:
x
+
4
3
×
(
x
+
4
)
=
6
×
(
−2
)
x
+
4
=
−4
x
=
−8
(16)
−3
:
−4
=
−5
x
:
−40
−4
×
(
−5
)
x
=
−3
×
(
−40
)
x
=
6