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©2025 数学クラブ http://sugaku.club/
月 日( )
● 次の方程式を解きなさい
[0E5-30]
(1)
10
(
−8
x
+
3
)
=
110
(2)
5
−1.2
(
−9
x
−
)
=
109
6
(3)
5
(
1.7
x
+
10
)
=
33
(4)
38
−10
(
−7
x
−
0.1
)
=
3
(5)
44
2
(
−
x
+
5
)
=
5
©2025 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
10
(
−8
x
+
3
)
=
110
−80
x
+
30
=
110
−80
x
=
110
−
30
x
=
−1
(2)
5
−1.2
(
−9
x
−
)
=
109
6
10.8
x
+
1
=
109
10.8
x
=
109
−
1
x
=
10
(3)
5
(
1.7
x
+
10
)
=
33
8.5
x
+
50
=
33
8.5
x
=
33
−
50
x
=
−2
(4)
38
−10
(
−7
x
−
0.1
)
=
3
70
x
+
1
38
=
3
70
x
38
=
−
1
3
x
1
=
6
(5)
44
2
(
−
x
+
5
)
=
5
−2
x
+
10
44
=
5
−2
x
44
=
−
10
5
x
3
=
5