[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)
x
+
4
:
−4
=
12
:
−3
(2)
−4
:
−1
=
−12
:
x
−
4
(3)
−3
:
x
+
4
=
2
:
−2
(4)
5
x
:
100
=
−3
:
4
(5)
−4
:
4
=
−3
x
:
−3
(6)
−4
:
2
=
5
x
:
−5
(7)
−60
:
−3
x
=
5
:
2
(8)
−2
:
2
x
=
3
:
15
(9)
5
:
3
=
x
−
3
:
−12
(10)
−3
:
1
=
x
+
5
:
2
(11)
5
:
−20
=
−3
:
x
−
1
(12)
9
:
−6
=
−4
x
:
−8
(13)
3
:
−3
=
−3
x
:
6
(14)
2
x
:
6
=
2
:
−1
(15)
9
:
−3
=
4
x
:
12
(16)
15
:
−5
=
x
−
5
:
2
©2026 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
x
+
4
:
−4
=
12
:
−3
−3
×
(
x
+
4
)
=
−4
×
12
x
+
4
=
16
x
=
12
(2)
−4
:
−1
=
−12
:
x
−
4
−4
×
(
x
−
4
)
=
−
(
−12
)
x
−
4
=
−3
x
=
1
(3)
−3
:
x
+
4
=
2
:
−2
2
×
(
x
+
4
)
=
−3
×
(
−2
)
x
+
4
=
3
x
=
−1
(4)
5
x
:
100
=
−3
:
4
4
×
5
x
=
100
×
(
−3
)
x
=
−15
(5)
−4
:
4
=
−3
x
:
−3
4
×
(
−3
)
x
=
−4
×
(
−3
)
x
=
−1
(6)
−4
:
2
=
5
x
:
−5
2
×
5
x
=
−4
×
(
−5
)
x
=
2
(7)
−60
:
−3
x
=
5
:
2
5
×
(
−3
)
x
=
−60
×
2
x
=
8
(8)
−2
:
2
x
=
3
:
15
3
×
2
x
=
−2
×
15
x
=
−5
(9)
5
:
3
=
x
−
3
:
−12
3
×
(
x
−
3
)
=
5
×
(
−12
)
x
−
3
=
−20
x
=
−17
(10)
−3
:
1
=
x
+
5
:
2
x
+
5
=
−3
×
2
x
+
5
=
−6
x
=
−11
(11)
5
:
−20
=
−3
:
x
−
1
5
×
(
x
−
1
)
=
−20
×
(
−3
)
x
−
1
=
12
x
=
13
(12)
9
:
−6
=
−4
x
:
−8
−6
×
(
−4
)
x
=
9
×
(
−8
)
x
=
−3
(13)
3
:
−3
=
−3
x
:
6
−3
×
(
−3
)
x
=
3
×
6
x
=
2
(14)
2
x
:
6
=
2
:
−1
−
2
x
=
6
×
2
x
=
−6
(15)
9
:
−3
=
4
x
:
12
−3
×
4
x
=
9
×
12
x
=
−9
(16)
15
:
−5
=
x
−
5
:
2
−5
×
(
x
−
5
)
=
15
×
2
x
−
5
=
−6
x
=
−1