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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)
−3
:
x
−
2
=
2
:
6
(2)
−4
:
−2
x
=
−2
:
8
(3)
x
−
1
:
4
=
1
:
2
(4)
−10
:
x
+
3
=
6
:
−3
(5)
−10
:
−2
=
x
+
3
:
−3
(6)
−3
:
−9
=
−1
:
x
+
3
(7)
−
x
:
10
=
−1
:
−2
(8)
−5
:
3
=
25
:
5
x
(9)
20
:
−4
=
5
:
x
−
2
(10)
45
:
3
x
=
−25
:
5
(11)
−6
:
x
+
5
=
3
:
−1
(12)
−2
x
:
−2
=
3
:
−1
(13)
−2
:
−1
=
16
:
−2
x
(14)
75
:
−3
x
=
−10
:
−2
(15)
6
:
−2
=
x
−
3
:
−1
(16)
1
:
2
=
4
x
:
−16
©2026 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
−3
:
x
−
2
=
2
:
6
2
×
(
x
−
2
)
=
−3
×
6
x
−
2
=
−9
x
=
−7
(2)
−4
:
−2
x
=
−2
:
8
−2
×
(
−2
)
x
=
−4
×
8
x
=
−8
(3)
x
−
1
:
4
=
1
:
2
2
×
(
x
−
1
)
=
4
x
−
1
=
2
x
=
3
(4)
−10
:
x
+
3
=
6
:
−3
6
×
(
x
+
3
)
=
−10
×
(
−3
)
x
+
3
=
5
x
=
2
(5)
−10
:
−2
=
x
+
3
:
−3
−2
×
(
x
+
3
)
=
−10
×
(
−3
)
x
+
3
=
−15
x
=
−18
(6)
−3
:
−9
=
−1
:
x
+
3
−3
×
(
x
+
3
)
=
−9
×
(
−1
)
x
+
3
=
−3
x
=
−6
(7)
−
x
:
10
=
−1
:
−2
−2
×
(
−1
)
x
=
10
×
(
−1
)
x
=
−5
(8)
−5
:
3
=
25
:
5
x
−5
×
5
x
=
3
×
25
x
=
−3
(9)
20
:
−4
=
5
:
x
−
2
20
×
(
x
−
2
)
=
−4
×
5
x
−
2
=
−1
x
=
1
(10)
45
:
3
x
=
−25
:
5
−25
×
3
x
=
45
×
5
x
=
−3
(11)
−6
:
x
+
5
=
3
:
−1
3
×
(
x
+
5
)
=
−6
×
(
−1
)
x
+
5
=
2
x
=
−3
(12)
−2
x
:
−2
=
3
:
−1
−
(
−2
)
x
=
−2
×
3
x
=
−3
(13)
−2
:
−1
=
16
:
−2
x
−2
×
(
−2
)
x
=
−
16
x
=
−4
(14)
75
:
−3
x
=
−10
:
−2
−10
×
(
−3
)
x
=
75
×
(
−2
)
x
=
−5
(15)
6
:
−2
=
x
−
3
:
−1
−2
×
(
x
−
3
)
=
6
×
(
−1
)
x
−
3
=
3
x
=
6
(16)
1
:
2
=
4
x
:
−16
2
×
4
x
=
−16
x
=
−2