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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
[0G2-00]
(1)
−6
:
x
=
−10
:
x
−
2
(2)
x
:
x
+
3
=
−2
:
−1
(3)
x
:
3
=
3
−
x
:
−2
(4)
1
:
x
=
2
:
x
−
2
(5)
8
:
2
=
x
−
9
:
x
(6)
−2
:
4
=
x
:
x
+
9
(7)
1
:
2
=
x
:
x
−
2
(8)
7
−
x
:
−6
=
x
:
−8
(9)
5
:
x
=
10
:
x
+
3
(10)
−8
:
x
−
9
=
−2
:
x
(11)
x
−
2
:
x
=
−8
:
−4
(12)
15
:
−4
−
x
=
5
:
x
(13)
−3
:
5
=
x
:
10
−
x
(14)
x
:
−2
=
−12
−
x
:
8
(15)
x
:
−6
=
x
+
5
:
−3
(16)
3
:
−1
=
x
:
−8
−
x
©2026 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
−6
:
x
=
−10
:
x
−
2
−6
(
x
−
2
)
=
−10
x
−6
x
+
12
=
−10
x
x
=
−3
(2)
x
:
x
+
3
=
−2
:
−1
−
x
=
−2
(
x
+
3
)
−
x
=
−2
x
−
6
x
=
−6
(3)
x
:
3
=
3
−
x
:
−2
−2
x
=
3
(
3
−
x
)
−2
x
=
9
−
3
x
x
=
9
(4)
1
:
x
=
2
:
x
−
2
x
−
2
=
2
x
x
−
2
=
2
x
x
=
−2
(5)
8
:
2
=
x
−
9
:
x
2
(
x
−
9
)
=
8
x
2
x
−
18
=
8
x
x
=
−3
(6)
−2
:
4
=
x
:
x
+
9
−2
(
x
+
9
)
=
4
x
−2
x
−
18
=
4
x
x
=
−3
(7)
1
:
2
=
x
:
x
−
2
x
−
2
=
2
x
x
−
2
=
2
x
x
=
−2
(8)
7
−
x
:
−6
=
x
:
−8
−8
(
7
−
x
)
=
−6
x
−56
+
8
x
=
−6
x
x
=
4
(9)
5
:
x
=
10
:
x
+
3
5
(
x
+
3
)
=
10
x
5
x
+
15
=
10
x
x
=
3
(10)
−8
:
x
−
9
=
−2
:
x
−2
(
x
−
9
)
=
−8
x
−2
x
+
18
=
−8
x
x
=
−3
(11)
x
−
2
:
x
=
−8
:
−4
−4
(
x
−
2
)
=
−8
x
−4
x
+
8
=
−8
x
x
=
−2
(12)
15
:
−4
−
x
=
5
:
x
5
(
−4
−
x
)
=
15
x
−20
−
5
x
=
15
x
x
=
−1
(13)
−3
:
5
=
x
:
10
−
x
−3
(
10
−
x
)
=
5
x
−30
+
3
x
=
5
x
x
=
−15
(14)
x
:
−2
=
−12
−
x
:
8
8
x
=
−2
(
−12
−
x
)
8
x
=
24
+
2
x
x
=
4
(15)
x
:
−6
=
x
+
5
:
−3
−3
x
=
−6
(
x
+
5
)
−3
x
=
−6
x
−
30
x
=
−10
(16)
3
:
−1
=
x
:
−8
−
x
3
(
−8
−
x
)
=
−
x
−24
−
3
x
=
−
x
x
=
−12