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©2026 数学クラブ http://sugaku.club/
月 日( )
● 次の方程式を解きなさい
[0E5-30]
(1)
8
234
6
(
x
−
7
)
=
−
9
5
(2)
−6
(
−1.1
x
+
1.5
)
=
43.8
(3)
8
(
−0.7
x
−
1.9
)
=
−54.4
(4)
1
22
−8
(
−
x
−
0.2
)
=
−
4
5
(5)
−0.3
(
−
x
+
8
)
=
0
©2026 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
8
234
6
(
x
−
7
)
=
−
9
5
16
x
−
42
3
234
=
−
5
16
x
3
234
=
−
+
42
5
x
9
=
−
10
(2)
−6
(
−1.1
x
+
1.5
)
=
43.8
6.6
x
−
9
=
43.8
6.6
x
=
43.8
+
9
x
=
8
(3)
8
(
−0.7
x
−
1.9
)
=
−54.4
−5.6
x
−
15.2
=
−54.4
−5.6
x
=
−54.4
+
15.2
x
=
7
(4)
1
22
−8
(
−
x
−
0.2
)
=
−
4
5
2
x
+
1.6
22
=
−
5
2
x
22
=
−
−
1.6
5
x
=
−3
(5)
−0.3
(
−
x
+
8
)
=
0
0.3
x
−
2.4
=
0
0.3
x
=
2.4
x
=
8