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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)
−0.6
＋
0.9
x
=
−1.1
x
(2)
0.2
＋
(
−0.5
)
x
=
−0.75
(3)
−1.4
＋
(
−1.2
)
x
=
0.28
(4)
−0.6
−
0.6
x
=
0.6
x
(5)
1.4
x
＋
(
−1
)
=
−3.66
(6)
0.14
−
(
−1.7
)
x
=
1.5
x
(7)
−0.7
−
0.1
x
=
−0.54
(8)
−1.3
x
−
(
−1.44
)
=
1.1
x
(9)
1.6
＋
(
−1.2
)
x
=
3.16
(10)
−1.2
−
(
−1.4
)
x
=
−3.72
(11)
−2
x
−
0.7
=
−1.9
(12)
1.3
＋
1.7
x
=
0.4
x
(13)
0.1
＋
1.3
x
=
−0.94
(14)
0.04
＋
1.1
x
=
1.2
x
©2025 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
−0.6
＋
0.9
x
=
−1.1
x
0.9
x
＋
1.1
x
=
0.6
2
x
=
0.6
x
=
0.3
(2)
0.2
＋
(
−0.5
)
x
=
−0.75
−0.5
x
=
−0.75
−
0.2
−0.5
x
=
−0.95
x
=
1.9
(3)
−1.4
＋
(
−1.2
)
x
=
0.28
−1.2
x
=
0.28
＋
1.4
−1.2
x
=
1.68
x
=
−1.4
(4)
−0.6
−
0.6
x
=
0.6
x
−
0.6
x
−
0.6
x
=
0.6
−1.2
x
=
0.6
x
=
−0.5
(5)
1.4
x
＋
(
−1
)
=
−3.66
1.4
x
=
−3.66
＋
1
1.4
x
=
−2.66
x
=
−1.9
(6)
0.14
−
(
−1.7
)
x
=
1.5
x
1.7
x
−
1.5
x
=
−
0.14
0.2
x
=
−0.14
x
=
−0.7
(7)
−0.7
−
0.1
x
=
−0.54
−
0.1
x
=
−0.54
＋
0.7
−
0.1
x
=
0.16
x
=
−1.6
(8)
−1.3
x
−
(
−1.44
)
=
1.1
x
−1.3
x
−
1.1
x
=
−1.44
−2.4
x
=
−1.44
x
=
0.6
(9)
1.6
＋
(
−1.2
)
x
=
3.16
−1.2
x
=
3.16
−
1.6
−1.2
x
=
1.56
x
=
−1.3
(10)
−1.2
−
(
−1.4
)
x
=
−3.72
1.4
x
=
−3.72
＋
1.2
1.4
x
=
−2.52
x
=
−1.8
(11)
−2
x
−
0.7
=
−1.9
−2
x
=
−1.9
＋
0.7
−2
x
=
−1.2
x
=
0.6
(12)
1.3
＋
1.7
x
=
0.4
x
1.7
x
−
0.4
x
=
−
1.3
1.3
x
=
−1.3
x
=
−1
(13)
0.1
＋
1.3
x
=
−0.94
1.3
x
=
−0.94
−
0.1
1.3
x
=
−1.04
x
=
−0.8
(14)
0.04
＋
1.1
x
=
1.2
x
1.1
x
−
1.2
x
=
−
0.04
−0.1
x
=
−0.04
x
=
0.4