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▼
▲
©2025 数学クラブ http://sugaku.club/
月 日( )
● 次の方程式を解きなさい
[0E5-30]
(1)
4
(
−7
x
−
5
)
=
−16
3
(2)
10
(
2
x
+
1.9
)
=
34
(3)
7
91
−
(
−1.6
x
+
9
)
=
−
5
9
(4)
2
22
1.2
(
2
x
+
)
=
3
5
(5)
2
150
−6
(
−
x
+
5
)
=
−
7
7
©2025 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
4
(
−7
x
−
5
)
=
−16
3
28
20
−
x
−
3
3
=
−16
28
−
x
3
20
=
−16
+
3
x
=
1
(2)
10
(
2
x
+
1.9
)
=
34
20
x
+
19
=
34
20
x
=
34
−
19
x
3
=
4
(3)
7
91
−
(
−1.6
x
+
9
)
=
−
5
9
56
63
x
−
25
5
91
=
−
9
56
x
25
91
63
=
−
+
9
5
x
10
=
9
(4)
2
22
1.2
(
2
x
+
)
=
3
5
4
2.4
x
+
5
22
=
5
2.4
x
22
4
=
−
5
5
x
3
=
2
(5)
2
150
−6
(
−
x
+
5
)
=
−
7
7
12
x
−
30
7
150
=
−
7
12
x
7
150
=
−
+
30
7
x
=
5