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©2024 数学クラブ http://sugaku.club/
月 日( )
● 次の方程式を解きなさい
[0E5-30]
(1)
1
7
18
(
−
x
+
10
)
=
2
4
5
(2)
−8
(
−10
x
−
8
)
=
208
(3)
3
(
−8
x
+
1.8
)
=
−4.2
(4)
3
−2
(
x
+
5
)
=
−19
2
(5)
3
9
0.5
(
−1.9
x
+
)
=
4
5
©2024 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
1
7
18
(
−
x
+
10
)
=
2
4
5
7
−
x
+
5
8
18
=
5
7
−
x
8
18
=
−
5
5
x
8
=
5
(2)
−8
(
−10
x
−
8
)
=
208
80
x
+
64
=
208
80
x
=
208
−
64
x
9
=
5
(3)
3
(
−8
x
+
1.8
)
=
−4.2
−24
x
+
5.4
=
−4.2
−24
x
=
−4.2
−
5.4
x
=
0.4
(4)
3
−2
(
x
+
5
)
=
−19
2
−3
x
−
10
=
−19
−3
x
=
−19
+
10
x
=
3
(5)
3
9
0.5
(
−1.9
x
+
)
=
4
5
3
−0.95
x
+
8
9
=
5
−0.95
x
9
3
=
−
5
8
x
3
=
−
2