[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
[0G1-10]
(1)
1.8
:
x
+
1.3
=
−0.1
:
−0.5
(2)
7
:
3
=
x
+
2
:
0.3
(3)
−0.7
x
:
0.7
=
−1.35
:
0.9
(4)
−1.1
:
−1.1
x
=
0.2
:
0.3
(5)
3
:
4
=
x
−
0.9
:
0.8
(6)
1.1
x
:
−1.65
=
1.4
:
−0.3
(7)
0.8
:
1.6
=
1.8
:
1.8
x
(8)
x
+
0.3
:
1.3
=
−1
:
−1.3
(9)
3
:
−7
=
x
+
2.1
:
−1.4
(10)
0.3
:
1.5
=
−1.6
:
x
−
2.2
(11)
4
:
9
=
−0.9
x
:
−1.62
(12)
−1.9
:
x
+
1.5
=
−0.8
:
−4
(13)
1
:
3
=
x
+
1.1
:
2.1
(14)
−11
:
−7
=
1.54
:
−0.7
x
(15)
17.6
:
2.2
x
=
−9.5
:
−1.9
(16)
−10.5
:
−8
=
x
+
0.2
:
−1.6
©2026 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
1.8
:
x
+
1.3
=
−0.1
:
−0.5
−0.1
×
(
x
+
1.3
)
=
1.8
×
(
−0.5
)
x
+
1.3
=
9
x
=
7.7
(2)
7
:
3
=
x
+
2
:
0.3
3
×
(
x
+
2
)
=
7
×
0.3
x
+
2
=
0.7
x
=
−1.3
(3)
−0.7
x
:
0.7
=
−1.35
:
0.9
0.9
×
(
−0.7
)
x
=
0.7
×
(
−1.35
)
x
=
1.5
(4)
−1.1
:
−1.1
x
=
0.2
:
0.3
0.2
×
(
−1.1
)
x
=
−1.1
×
0.3
x
=
1.5
(5)
3
:
4
=
x
−
0.9
:
0.8
4
×
(
x
−
0.9
)
=
3
×
0.8
x
−
0.9
=
0.6
x
=
1.5
(6)
1.1
x
:
−1.65
=
1.4
:
−0.3
−0.3
×
1.1
x
=
−1.65
×
1.4
x
=
7
(7)
0.8
:
1.6
=
1.8
:
1.8
x
0.8
×
1.8
x
=
1.6
×
1.8
x
=
2
(8)
x
+
0.3
:
1.3
=
−1
:
−1.3
−1.3
×
(
x
+
0.3
)
=
1.3
×
(
−1
)
x
+
0.3
=
1
x
=
0.7
(9)
3
:
−7
=
x
+
2.1
:
−1.4
−7
×
(
x
+
2.1
)
=
3
×
(
−1.4
)
x
+
2.1
=
0.6
x
=
−1.5
(10)
0.3
:
1.5
=
−1.6
:
x
−
2.2
0.3
×
(
x
−
2.2
)
=
1.5
×
(
−1.6
)
x
−
2.2
=
−8
x
=
−5.8
(11)
4
:
9
=
−0.9
x
:
−1.62
9
×
(
−0.9
)
x
=
4
×
(
−1.62
)
x
=
0.8
(12)
−1.9
:
x
+
1.5
=
−0.8
:
−4
−0.8
×
(
x
+
1.5
)
=
−1.9
×
(
−4
)
x
+
1.5
=
−9.5
x
=
−11
(13)
1
:
3
=
x
+
1.1
:
2.1
3
×
(
x
+
1.1
)
=
2.1
x
+
1.1
=
0.7
x
=
−0.4
(14)
−11
:
−7
=
1.54
:
−0.7
x
−11
×
(
−0.7
)
x
=
−7
×
1.54
x
=
−1.4
(15)
17.6
:
2.2
x
=
−9.5
:
−1.9
−9.5
×
2.2
x
=
17.6
×
(
−1.9
)
x
=
1.6
(16)
−10.5
:
−8
=
x
+
0.2
:
−1.6
−8
×
(
x
+
0.2
)
=
−10.5
×
(
−1.6
)
x
+
0.2
=
−2.1
x
=
−2.3