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©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)
−4
:
x
+
3
=
−1
:
3
(2)
−4
:
x
−
5
=
16
:
4
(3)
−4
:
−2
=
x
−
3
:
10
(4)
15
:
−5
x
=
1
:
4
(5)
−12
:
3
=
−64
:
4
x
(6)
3
x
:
−18
=
−4
:
8
(7)
−5
:
4
=
10
:
x
−
2
(8)
4
:
−2
=
−8
:
x
+
5
(9)
−5
:
5
=
5
:
−5
x
(10)
x
−
2
:
12
=
−1
:
4
(11)
−8
:
12
=
−
x
:
3
(12)
2
x
:
8
=
1
:
2
(13)
−2
:
1
=
−4
x
:
16
(14)
−30
:
−3
x
=
−15
:
−3
(15)
−4
:
1
=
36
:
3
x
(16)
4
:
x
+
2
=
16
:
−12
©2026 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
−4
:
x
+
3
=
−1
:
3
−
(
x
+
3
)
=
−4
×
3
x
+
3
=
12
x
=
9
(2)
−4
:
x
−
5
=
16
:
4
16
×
(
x
−
5
)
=
−4
×
4
x
−
5
=
−1
x
=
4
(3)
−4
:
−2
=
x
−
3
:
10
−2
×
(
x
−
3
)
=
−4
×
10
x
−
3
=
20
x
=
23
(4)
15
:
−5
x
=
1
:
4
−5
x
=
15
×
4
x
=
−12
(5)
−12
:
3
=
−64
:
4
x
−12
×
4
x
=
3
×
(
−64
)
x
=
4
(6)
3
x
:
−18
=
−4
:
8
8
×
3
x
=
−18
×
(
−4
)
x
=
3
(7)
−5
:
4
=
10
:
x
−
2
−5
×
(
x
−
2
)
=
4
×
10
x
−
2
=
−8
x
=
−6
(8)
4
:
−2
=
−8
:
x
+
5
4
×
(
x
+
5
)
=
−2
×
(
−8
)
x
+
5
=
4
x
=
−1
(9)
−5
:
5
=
5
:
−5
x
−5
×
(
−5
)
x
=
5
×
5
x
=
1
(10)
x
−
2
:
12
=
−1
:
4
4
×
(
x
−
2
)
=
12
×
(
−1
)
x
−
2
=
−3
x
=
−1
(11)
−8
:
12
=
−
x
:
3
12
×
(
−1
)
x
=
−8
×
3
x
=
2
(12)
2
x
:
8
=
1
:
2
2
×
2
x
=
8
x
=
2
(13)
−2
:
1
=
−4
x
:
16
−4
x
=
−2
×
16
x
=
8
(14)
−30
:
−3
x
=
−15
:
−3
−15
×
(
−3
)
x
=
−30
×
(
−3
)
x
=
2
(15)
−4
:
1
=
36
:
3
x
−4
×
3
x
=
36
x
=
−3
(16)
4
:
x
+
2
=
16
:
−12
16
×
(
x
+
2
)
=
4
×
(
−12
)
x
+
2
=
−3
x
=
−5