［文字サイズの変更］
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©2019 数学クラブ http://sugaku.club/
月 日（ ）
● 次の方程式を解きなさい
[0E2-10]
(1)
1.14
−
(
−0.3
)
x
=
−0.3
x
(2)
0.5
x
−
(
−1.35
)
=
−0.4
x
(3)
0.1
−
(
−1.6
)
x
=
0.6
x
(4)
−1.6
x
−
(
−2.8
)
=
−0.2
x
(5)
0.12
−
1.9
x
=
−2
x
(6)
−1.8
−
0.5
x
=
0.5
x
(7)
−0.3
x
＋
(
−1.7
)
=
−2.21
(8)
1.9
x
−
1.53
=
0.2
x
(9)
−1.26
−
0.5
x
=
0.9
x
(10)
1.6
−
1.7
x
=
3.13
(11)
0.3
x
−
0.36
=
−0.6
x
(12)
1.4
−
(
−1.5
)
x
=
0.65
(13)
0.4
−
(
−0.1
)
x
=
0.23
(14)
−2
x
＋
(
−1
)
=
−0.8
©2019 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
1.14
−
(
−0.3
)
x
=
−0.3
x
0.3
x
＋
0.3
x
=
−
1.14
0.6
x
=
−1.14
x
=
−1.9
(2)
0.5
x
−
(
−1.35
)
=
−0.4
x
0.5
x
＋
0.4
x
=
−1.35
0.9
x
=
−1.35
x
=
−1.5
(3)
0.1
−
(
−1.6
)
x
=
0.6
x
1.6
x
−
0.6
x
=
−
0.1
x
=
−0.1
(4)
−1.6
x
−
(
−2.8
)
=
−0.2
x
−1.6
x
＋
0.2
x
=
−2.8
−1.4
x
=
−2.8
x
=
2
(5)
0.12
−
1.9
x
=
−2
x
−
1.9
x
＋
2
x
=
−
0.12
0.1
x
=
−0.12
x
=
−1.2
(6)
−1.8
−
0.5
x
=
0.5
x
−
0.5
x
−
0.5
x
=
1.8
−
x
=
1.8
x
=
−1.8
(7)
−0.3
x
＋
(
−1.7
)
=
−2.21
−0.3
x
=
−2.21
＋
1.7
−0.3
x
=
−0.51
x
=
1.7
(8)
1.9
x
−
1.53
=
0.2
x
1.9
x
−
0.2
x
=
1.53
1.7
x
=
1.53
x
=
0.9
(9)
−1.26
−
0.5
x
=
0.9
x
−
0.5
x
−
0.9
x
=
1.26
−1.4
x
=
1.26
x
=
−0.9
(10)
1.6
−
1.7
x
=
3.13
−
1.7
x
=
3.13
−
1.6
−
1.7
x
=
1.53
x
=
−0.9
(11)
0.3
x
−
0.36
=
−0.6
x
0.3
x
＋
0.6
x
=
0.36
0.9
x
=
0.36
x
=
0.4
(12)
1.4
−
(
−1.5
)
x
=
0.65
1.5
x
=
0.65
−
1.4
1.5
x
=
−0.75
x
=
−0.5
(13)
0.4
−
(
−0.1
)
x
=
0.23
0.1
x
=
0.23
−
0.4
0.1
x
=
−0.17
x
=
−1.7
(14)
−2
x
＋
(
−1
)
=
−0.8
−2
x
=
−0.8
＋
1
−2
x
=
0.2
x
=
−0.1