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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
(
6
x
+
1.6
)
=
29.4
(2)
3
(
10
x
+
4
)
=
162
(3)
−6
(
−4
x
+
1.6
)
=
182.4
(4)
1
74
−8
(
1.4
x
−
)
=
−
4
5
(5)
5
(
1.7
x
−
0.4
)
=
−44.5
©2026 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
−3
(
6
x
+
1.6
)
=
29.4
−18
x
−
4.8
=
29.4
−18
x
=
29.4
+
4.8
x
=
−1.9
(2)
3
(
10
x
+
4
)
=
162
30
x
+
12
=
162
30
x
=
162
−
12
x
=
5
(3)
−6
(
−4
x
+
1.6
)
=
182.4
24
x
−
9.6
=
182.4
24
x
=
182.4
+
9.6
x
=
8
(4)
1
74
−8
(
1.4
x
−
)
=
−
4
5
−11.2
x
+
2
74
=
−
5
−11.2
x
74
=
−
−
2
5
x
3
=
2
(5)
5
(
1.7
x
−
0.4
)
=
−44.5
8.5
x
−
2
=
−44.5
8.5
x
=
−44.5
+
2
x
=
−5