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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
[0E3-10]
(1)
−1.4
x
−
1.9
=
−1.36
−
1.7
x
(2)
−1.7
+
0.1
x
=
−0.56
−
0.5
x
(3)
−1.9
+
0.4
x
=
−2.94
+
1.7
x
(4)
−0.6
+
0.9
x
=
−1.3
+
1.4
x
(5)
−1
+
0.9
x
=
−3.88
−
1.5
x
©2024 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
−1.4
x
−
1.9
=
−1.36
−
1.7
x
−1.4
x
+
1.7
x
=
−1.36
+
1.9
x
=
0.54
÷
0.3
x
=
1.8
(2)
−1.7
+
0.1
x
=
−0.56
−
0.5
x
0.1
x
+
0.5
x
=
−0.56
+
1.7
x
=
1.14
÷
0.6
x
=
1.9
(3)
−1.9
+
0.4
x
=
−2.94
+
1.7
x
0.4
x
−
1.7
x
=
−2.94
+
1.9
x
=
−1.04
÷
(
−1.3
)
x
=
0.8
(4)
−0.6
+
0.9
x
=
−1.3
+
1.4
x
0.9
x
−
1.4
x
=
−1.3
+
0.6
x
=
−0.7
÷
(
−0.5
)
x
=
1.4
(5)
−1
+
0.9
x
=
−3.88
−
1.5
x
0.9
x
+
1.5
x
=
−3.88
+
1
x
=
−2.88
÷
2.4
x
=
−1.2