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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
−8
(
2
x
+
)
=
151
8
(2)
5
19
−
(
5
x
+
1.7
)
=
3
3
(3)
1
3
25
−
(
−
x
−
5
)
=
2
4
8
(4)
−4
(
3
x
+
6
)
=
−72
(5)
3
(
1.7
x
+
5
)
=
55.8
©2026 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
9
−8
(
2
x
+
)
=
151
8
−16
x
−
9
=
151
−16
x
=
151
+
9
x
=
−10
(2)
5
19
−
(
5
x
+
1.7
)
=
3
3
25
17
−
x
−
3
6
19
=
3
25
−
x
3
19
17
=
+
3
6
x
11
=
−
10
(3)
1
3
25
−
(
−
x
−
5
)
=
2
4
8
3
5
x
+
8
2
25
=
8
3
x
8
25
5
=
−
8
2
x
5
=
3
(4)
−4
(
3
x
+
6
)
=
−72
−12
x
−
24
=
−72
−12
x
=
−72
+
24
x
=
4
(5)
3
(
1.7
x
+
5
)
=
55.8
5.1
x
+
15
=
55.8
5.1
x
=
55.8
−
15
x
=
8