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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)
5
(
−2
x
−
1.2
)
=
−24
(2)
11
7
11
−
(
x
−
4
)
=
−
6
5
2
(3)
4
9
(
x
+
1.3
)
=
18
5
(4)
−10
(
−1.1
x
−
1.5
)
=
−51
(5)
2
6
(
−8
x
+
)
=
−236
3
©2026 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
5
(
−2
x
−
1.2
)
=
−24
−10
x
−
6
=
−24
−10
x
=
−24
+
6
x
9
=
5
(2)
11
7
11
−
(
x
−
4
)
=
−
6
5
2
77
22
−
x
+
30
3
11
=
−
2
77
−
x
30
11
22
=
−
−
2
3
x
=
5
(3)
4
9
(
x
+
1.3
)
=
18
5
36
x
+
11.7
5
=
18
36
x
5
=
18
−
11.7
x
7
=
8
(4)
−10
(
−1.1
x
−
1.5
)
=
−51
11
x
+
15
=
−51
11
x
=
−51
−
15
x
=
−6
(5)
2
6
(
−8
x
+
)
=
−236
3
−48
x
+
4
=
−236
−48
x
=
−236
−
4
x
=
5