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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)
−9
(
−
x
−
5
)
=
33
(2)
−1.6
(
−7
x
−
1
)
=
−4
(3)
1
13
(
−0.5
x
+
4
)
=
2
8
(4)
0.9
(
2
x
−
7
)
=
−11.7
(5)
19
10
(
7
x
+
)
=
−191
10
©2026 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
−9
(
−
x
−
5
)
=
33
9
x
+
45
=
33
9
x
=
33
−
45
x
4
=
−
3
(2)
−1.6
(
−7
x
−
1
)
=
−4
11.2
x
+
1.6
=
−4
11.2
x
=
−4
−
1.6
x
=
−0.5
(3)
1
13
(
−0.5
x
+
4
)
=
2
8
1
−
x
+
2
4
13
=
8
1
−
x
4
13
=
−
2
8
x
3
=
2
(4)
0.9
(
2
x
−
7
)
=
−11.7
1.8
x
−
6.3
=
−11.7
1.8
x
=
−11.7
+
6.3
x
=
−3
(5)
19
10
(
7
x
+
)
=
−191
10
70
x
+
19
=
−191
70
x
=
−191
−
19
x
=
−3