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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)
3
171
(
4
x
+
5
)
=
2
10
(2)
1
22
(
−8
x
−
6
)
=
3
9
(3)
3
84
1.2
(
x
−
1
)
=
2
5
(4)
5
1
0.5
(
x
+
4
)
=
8
8
(5)
−4
(
1.5
x
+
1.3
)
=
−13.6
©2026 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
3
171
(
4
x
+
5
)
=
2
10
15
6
x
+
2
171
=
10
6
x
171
15
=
−
10
2
x
8
=
5
(2)
1
22
(
−8
x
−
6
)
=
3
9
8
−
x
−
2
3
22
=
9
8
−
x
3
22
=
+
2
9
x
5
=
−
3
(3)
3
84
1.2
(
x
−
1
)
=
2
5
9
x
−
1.2
5
84
=
5
9
x
5
84
=
+
1.2
5
x
=
10
(4)
5
1
0.5
(
x
+
4
)
=
8
8
5
x
+
2
16
1
=
8
5
x
16
1
=
−
2
8
x
=
−6
(5)
−4
(
1.5
x
+
1.3
)
=
−13.6
−6
x
−
5.2
=
−13.6
−6
x
=
−13.6
+
5.2
x
=
1.4