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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)
−4
(
−2
x
+
4
)
=
−48
(2)
6
(
9
x
+
7
)
=
−39
(3)
4
(
x
−
3
)
=
4
(4)
5
104
4
(
x
+
7
)
=
6
3
(5)
1.9
(
−1.5
x
+
8
)
=
23.75
©2026 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
−4
(
−2
x
+
4
)
=
−48
8
x
−
16
=
−48
8
x
=
−48
+
16
x
=
−4
(2)
6
(
9
x
+
7
)
=
−39
54
x
+
42
=
−39
54
x
=
−39
−
42
x
3
=
−
2
(3)
4
(
x
−
3
)
=
4
4
x
−
12
=
4
4
x
=
4
+
12
x
=
4
(4)
5
104
4
(
x
+
7
)
=
6
3
10
x
+
28
3
104
=
3
10
x
3
104
=
−
28
3
x
=
2
(5)
1.9
(
−1.5
x
+
8
)
=
23.75
−2.85
x
+
15.2
=
23.75
−2.85
x
=
23.75
−
15.2
x
=
−3