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©2024 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
−
(
−3.96
)
=
−1.1
x
(2)
0.16
＋
0.1
x
=
0.9
x
(3)
−3.6
＋
0.7
x
=
−1.1
x
(4)
−2
−
0.4
x
=
−1.24
(5)
0.04
−
1.2
x
=
−1.6
x
(6)
−1.7
x
＋
6.66
=
2
x
(7)
1.4
x
−
(
−0.4
)
=
1.8
(8)
−0.2
−
(
−1.5
)
x
=
−0.95
(9)
1.1
x
＋
0.4
=
−0.26
(10)
−0.28
−
(
−1.4
)
x
=
x
(11)
−1.5
x
−
(
−1.1
)
=
3.5
(12)
−1.6
x
−
1.4
=
1.48
(13)
1.1
x
−
1.1
=
−3.3
(14)
2.52
−
0.3
x
=
1.8
x
©2024 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
1.1
x
−
(
−3.96
)
=
−1.1
x
1.1
x
＋
1.1
x
=
−3.96
2.2
x
=
−3.96
x
=
−1.8
(2)
0.16
＋
0.1
x
=
0.9
x
0.1
x
−
0.9
x
=
−
0.16
−0.8
x
=
−0.16
x
=
0.2
(3)
−3.6
＋
0.7
x
=
−1.1
x
0.7
x
＋
1.1
x
=
3.6
1.8
x
=
3.6
x
=
2
(4)
−2
−
0.4
x
=
−1.24
−
0.4
x
=
−1.24
＋
2
−
0.4
x
=
0.76
x
=
−1.9
(5)
0.04
−
1.2
x
=
−1.6
x
−
1.2
x
＋
1.6
x
=
−
0.04
0.4
x
=
−0.04
x
=
−0.1
(6)
−1.7
x
＋
6.66
=
2
x
−1.7
x
−
2
x
=
−
6.66
−3.7
x
=
−6.66
x
=
1.8
(7)
1.4
x
−
(
−0.4
)
=
1.8
1.4
x
=
1.8
−
0.4
1.4
x
=
1.4
x
=
1
(8)
−0.2
−
(
−1.5
)
x
=
−0.95
1.5
x
=
−0.95
＋
0.2
1.5
x
=
−0.75
x
=
−0.5
(9)
1.1
x
＋
0.4
=
−0.26
1.1
x
=
−0.26
−
0.4
1.1
x
=
−0.66
x
=
−0.6
(10)
−0.28
−
(
−1.4
)
x
=
x
1.4
x
−
x
=
0.28
0.4
x
=
0.28
x
=
0.7
(11)
−1.5
x
−
(
−1.1
)
=
3.5
−1.5
x
=
3.5
−
1.1
−1.5
x
=
2.4
x
=
−1.6
(12)
−1.6
x
−
1.4
=
1.48
−1.6
x
=
1.48
＋
1.4
−1.6
x
=
2.88
x
=
−1.8
(13)
1.1
x
−
1.1
=
−3.3
1.1
x
=
−3.3
＋
1.1
1.1
x
=
−2.2
x
=
−2
(14)
2.52
−
0.3
x
=
1.8
x
−
0.3
x
−
1.8
x
=
−
2.52
−2.1
x
=
−2.52
x
=
1.2