[文字サイズの変更]
▼
▲
©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)
−0.8
(
−
x
−
10
)
=
1.6
(2)
1.3
(
−8
x
−
6
)
=
−28.6
(3)
−10
(
−0.7
x
−
4
)
=
−2
(4)
2
230
6
(
x
−
5
)
=
−
3
9
(5)
−5
(
5
x
+
0.8
)
=
−154
©2024 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
−0.8
(
−
x
−
10
)
=
1.6
0.8
x
+
8
=
1.6
0.8
x
=
1.6
−
8
x
=
−8
(2)
1.3
(
−8
x
−
6
)
=
−28.6
−10.4
x
−
7.8
=
−28.6
−10.4
x
=
−28.6
+
7.8
x
=
2
(3)
−10
(
−0.7
x
−
4
)
=
−2
7
x
+
40
=
−2
7
x
=
−2
−
40
x
=
−6
(4)
2
230
6
(
x
−
5
)
=
−
3
9
4
x
−
30
230
=
−
9
4
x
230
=
−
+
30
9
x
10
=
9
(5)
−5
(
5
x
+
0.8
)
=
−154
−25
x
−
4
=
−154
−25
x
=
−154
+
4
x
=
6