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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)
−8
(
−2
x
+
2
)
=
−28.8
(2)
1
(
−3
x
+
1
)
=
14
2
(3)
118
−4
(
−6
x
−
1.1
)
=
−
5
(4)
1
44
8
(
−
x
+
1.5
)
=
2
9
(5)
26
3
(
−5
x
+
1.6
)
=
−
5
©2026 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
−8
(
−2
x
+
2
)
=
−28.8
16
x
−
16
=
−28.8
16
x
=
−28.8
+
16
x
=
−0.8
(2)
1
(
−3
x
+
1
)
=
14
2
3
1
−
x
+
2
2
=
14
3
−
x
2
1
=
14
−
2
x
=
−9
(3)
118
−4
(
−6
x
−
1.1
)
=
−
5
24
x
+
4.4
118
=
−
5
24
x
118
=
−
−
4.4
5
x
7
=
−
6
(4)
1
44
8
(
−
x
+
1.5
)
=
2
9
−4
x
+
12
44
=
9
−4
x
44
=
−
12
9
x
16
=
9
(5)
26
3
(
−5
x
+
1.6
)
=
−
5
−15
x
+
4.8
26
=
−
5
−15
x
26
=
−
−
4.8
5
x
2
=
3