[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
:
−75
=
2
:
−6
(2)
−4
:
−1
=
4
:
x
−
2
(3)
−2
x
:
−2
=
−6
:
3
(4)
8
:
−4
x
=
10
:
−5
(5)
−16
:
−4
=
x
+
2
:
−2
(6)
−
x
:
−2
=
−5
:
−1
(7)
−2
:
2
=
x
−
5
:
−4
(8)
30
:
−3
x
=
5
:
−1
(9)
4
:
2
=
−10
:
x
−
1
(10)
−2
:
1
=
3
x
:
6
(11)
4
:
−16
=
−5
x
:
100
(12)
4
:
−
x
=
16
:
12
(13)
−20
:
−5
x
=
8
:
−4
(14)
12
:
−4
x
=
−1
:
5
(15)
−20
:
5
x
=
8
:
10
(16)
−
x
:
−5
=
−6
:
−3
©2026 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
−5
x
:
−75
=
2
:
−6
−6
×
(
−5
)
x
=
−75
×
2
x
=
−5
(2)
−4
:
−1
=
4
:
x
−
2
−4
×
(
x
−
2
)
=
−
4
x
−
2
=
1
x
=
3
(3)
−2
x
:
−2
=
−6
:
3
3
×
(
−2
)
x
=
−2
×
(
−6
)
x
=
−2
(4)
8
:
−4
x
=
10
:
−5
10
×
(
−4
)
x
=
8
×
(
−5
)
x
=
1
(5)
−16
:
−4
=
x
+
2
:
−2
−4
×
(
x
+
2
)
=
−16
×
(
−2
)
x
+
2
=
−8
x
=
−10
(6)
−
x
:
−2
=
−5
:
−1
x
=
−2
×
(
−5
)
x
=
10
(7)
−2
:
2
=
x
−
5
:
−4
2
×
(
x
−
5
)
=
−2
×
(
−4
)
x
−
5
=
4
x
=
9
(8)
30
:
−3
x
=
5
:
−1
5
×
(
−3
)
x
=
30
×
(
−1
)
x
=
2
(9)
4
:
2
=
−10
:
x
−
1
4
×
(
x
−
1
)
=
2
×
(
−10
)
x
−
1
=
−5
x
=
−4
(10)
−2
:
1
=
3
x
:
6
3
x
=
−2
×
6
x
=
−4
(11)
4
:
−16
=
−5
x
:
100
−16
×
(
−5
)
x
=
4
×
100
x
=
5
(12)
4
:
−
x
=
16
:
12
16
×
(
−1
)
x
=
4
×
12
x
=
−3
(13)
−20
:
−5
x
=
8
:
−4
8
×
(
−5
)
x
=
−20
×
(
−4
)
x
=
−2
(14)
12
:
−4
x
=
−1
:
5
−
(
−4
)
x
=
12
×
5
x
=
15
(15)
−20
:
5
x
=
8
:
10
8
×
5
x
=
−20
×
10
x
=
−5
(16)
−
x
:
−5
=
−6
:
−3
−3
×
(
−1
)
x
=
−5
×
(
−6
)
x
=
10