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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)
6
(
−0.8
x
−
1.3
)
=
−41.4
(2)
−5
(
1.1
x
+
0.4
)
=
−13
(3)
−10
(
−6
x
−
7
)
=
160
(4)
3
10
(
−7
x
+
)
=
−134
5
(5)
3
9
(
x
−
2
)
=
−99
2
©2026 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
6
(
−0.8
x
−
1.3
)
=
−41.4
−4.8
x
−
7.8
=
−41.4
−4.8
x
=
−41.4
+
7.8
x
=
7
(2)
−5
(
1.1
x
+
0.4
)
=
−13
−5.5
x
−
2
=
−13
−5.5
x
=
−13
+
2
x
=
2
(3)
−10
(
−6
x
−
7
)
=
160
60
x
+
70
=
160
60
x
=
160
−
70
x
3
=
2
(4)
3
10
(
−7
x
+
)
=
−134
5
−70
x
+
6
=
−134
−70
x
=
−134
−
6
x
=
2
(5)
3
9
(
x
−
2
)
=
−99
2
27
x
−
18
2
=
−99
27
x
2
=
−99
+
18
x
=
−6