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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
[0E2-10]
(1)
1.1
x
−
1.4
=
−3.27
(2)
−0.6
x
−
(
−0.14
)
=
−0.5
x
(3)
−1.9
x
−
(
−1.12
)
=
−0.5
x
(4)
−0.6
−
1.4
x
=
−0.4
x
(5)
−1.1
＋
(
−1.5
)
x
=
−0.65
(6)
−1.4
x
＋
(
−1.9
)
=
−2.32
(7)
−2.28
＋
1.4
x
=
0.2
x
(8)
1.2
x
−
0.08
=
1.4
x
(9)
1.8
＋
(
−1.8
)
x
=
5.22
(10)
7.6
＋
(
−2
)
x
=
2
x
(11)
1.12
−
0.4
x
=
0.4
x
(12)
2
＋
(
−0.5
)
x
=
2.25
(13)
1.5
x
＋
(
−2.25
)
=
−
x
(14)
1.32
−
1.7
x
=
−0.6
x
©2025 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
1.1
x
−
1.4
=
−3.27
1.1
x
=
−3.27
＋
1.4
1.1
x
=
−1.87
x
=
−1.7
(2)
−0.6
x
−
(
−0.14
)
=
−0.5
x
−0.6
x
＋
0.5
x
=
−0.14
−0.1
x
=
−0.14
x
=
1.4
(3)
−1.9
x
−
(
−1.12
)
=
−0.5
x
−1.9
x
＋
0.5
x
=
−1.12
−1.4
x
=
−1.12
x
=
0.8
(4)
−0.6
−
1.4
x
=
−0.4
x
−
1.4
x
＋
0.4
x
=
0.6
−
x
=
0.6
x
=
−0.6
(5)
−1.1
＋
(
−1.5
)
x
=
−0.65
−1.5
x
=
−0.65
＋
1.1
−1.5
x
=
0.45
x
=
−0.3
(6)
−1.4
x
＋
(
−1.9
)
=
−2.32
−1.4
x
=
−2.32
＋
1.9
−1.4
x
=
−0.42
x
=
0.3
(7)
−2.28
＋
1.4
x
=
0.2
x
1.4
x
−
0.2
x
=
2.28
1.2
x
=
2.28
x
=
1.9
(8)
1.2
x
−
0.08
=
1.4
x
1.2
x
−
1.4
x
=
0.08
−0.2
x
=
0.08
x
=
−0.4
(9)
1.8
＋
(
−1.8
)
x
=
5.22
−1.8
x
=
5.22
−
1.8
−1.8
x
=
3.42
x
=
−1.9
(10)
7.6
＋
(
−2
)
x
=
2
x
−2
x
−
2
x
=
−
7.6
−4
x
=
−7.6
x
=
1.9
(11)
1.12
−
0.4
x
=
0.4
x
−
0.4
x
−
0.4
x
=
−
1.12
−0.8
x
=
−1.12
x
=
1.4
(12)
2
＋
(
−0.5
)
x
=
2.25
−0.5
x
=
2.25
−
2
−0.5
x
=
0.25
x
=
−0.5
(13)
1.5
x
＋
(
−2.25
)
=
−
x
1.5
x
＋
x
=
2.25
2.5
x
=
2.25
x
=
0.9
(14)
1.32
−
1.7
x
=
−0.6
x
−
1.7
x
＋
0.6
x
=
−
1.32
−1.1
x
=
−1.32
x
=
1.2