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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)
7
74
1.2
(
x
−
10
)
=
−
6
5
(2)
242
4
(
1.4
x
+
10
)
=
5
(3)
−4
(
−
x
+
1
)
=
8
(4)
93
2
(
2
x
+
1.9
)
=
10
(5)
0.6
(
0.5
x
−
7
)
=
−4.5
©2026 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
7
74
1.2
(
x
−
10
)
=
−
6
5
7
x
−
12
5
74
=
−
5
7
x
5
74
=
−
+
12
5
x
=
−2
(2)
242
4
(
1.4
x
+
10
)
=
5
5.6
x
+
40
242
=
5
5.6
x
242
=
−
40
5
x
3
=
2
(3)
−4
(
−
x
+
1
)
=
8
4
x
−
4
=
8
4
x
=
8
+
4
x
=
3
(4)
93
2
(
2
x
+
1.9
)
=
10
4
x
+
3.8
93
=
10
4
x
93
=
−
3.8
10
x
11
=
8
(5)
0.6
(
0.5
x
−
7
)
=
−4.5
0.3
x
−
4.2
=
−4.5
0.3
x
=
−4.5
+
4.2
x
=
−1