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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)
−10
:
2
=
10
:
2
x
(2)
3
:
x
−
4
=
−1
:
3
(3)
−4
:
−1
=
−64
:
−4
x
(4)
4
x
:
16
=
−5
:
2
(5)
x
+
3
:
9
=
5
:
−3
(6)
16
:
4
=
36
:
−3
x
(7)
10
:
x
−
4
=
−2
:
3
(8)
−4
:
−3
=
−3
x
:
18
(9)
5
:
2
=
−4
x
:
32
(10)
−1
:
−3
=
x
+
2
:
−9
(11)
−3
:
−3
x
=
−3
:
3
(12)
2
:
−5
=
10
:
x
+
4
(13)
−16
:
4
x
=
−1
:
1
(14)
−4
:
−2
=
x
−
5
:
1
(15)
−5
:
x
−
3
=
15
:
9
(16)
3
:
−2
=
−15
:
x
−
5
©2026 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
−10
:
2
=
10
:
2
x
−10
×
2
x
=
2
×
10
x
=
−1
(2)
3
:
x
−
4
=
−1
:
3
−
(
x
−
4
)
=
3
×
3
x
−
4
=
−9
x
=
−5
(3)
−4
:
−1
=
−64
:
−4
x
−4
×
(
−4
)
x
=
−
(
−64
)
x
=
4
(4)
4
x
:
16
=
−5
:
2
2
×
4
x
=
16
×
(
−5
)
x
=
−10
(5)
x
+
3
:
9
=
5
:
−3
−3
×
(
x
+
3
)
=
9
×
5
x
+
3
=
−15
x
=
−18
(6)
16
:
4
=
36
:
−3
x
16
×
(
−3
)
x
=
4
×
36
x
=
−3
(7)
10
:
x
−
4
=
−2
:
3
−2
×
(
x
−
4
)
=
10
×
3
x
−
4
=
−15
x
=
−11
(8)
−4
:
−3
=
−3
x
:
18
−3
×
(
−3
)
x
=
−4
×
18
x
=
−8
(9)
5
:
2
=
−4
x
:
32
2
×
(
−4
)
x
=
5
×
32
x
=
−20
(10)
−1
:
−3
=
x
+
2
:
−9
−3
×
(
x
+
2
)
=
−
(
−9
)
x
+
2
=
−3
x
=
−5
(11)
−3
:
−3
x
=
−3
:
3
−3
×
(
−3
)
x
=
−3
×
3
x
=
−1
(12)
2
:
−5
=
10
:
x
+
4
2
×
(
x
+
4
)
=
−5
×
10
x
+
4
=
−25
x
=
−29
(13)
−16
:
4
x
=
−1
:
1
−
4
x
=
−16
x
=
4
(14)
−4
:
−2
=
x
−
5
:
1
−2
×
(
x
−
5
)
=
−4
x
−
5
=
2
x
=
7
(15)
−5
:
x
−
3
=
15
:
9
15
×
(
x
−
3
)
=
−5
×
9
x
−
3
=
−3
x
=
0
(16)
3
:
−2
=
−15
:
x
−
5
3
×
(
x
−
5
)
=
−2
×
(
−15
)
x
−
5
=
10
x
=
15