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©2026 数学クラブ http://sugaku.club/
月 日( )
● 次の方程式を解きなさい
[0E3-10]
(1)
−1.6
−
x
=
−0.8
+
x
(2)
1.1
−
0.3
x
=
1.88
+
0.3
x
(3)
0.9
x
+
1.9
=
1.86
+
0.8
x
(4)
−0.1
x
−
0.7
=
−0.63
−
0.8
x
(5)
−0.2
x
+
1.5
=
−1.2
x
+
2.4
©2026 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
−1.6
−
x
=
−0.8
+
x
−
x
−
x
=
−0.8
+
1.6
x
=
0.8
÷
(
−2
)
x
=
−0.4
(2)
1.1
−
0.3
x
=
1.88
+
0.3
x
−
0.3
x
−
0.3
x
=
1.88
−
1.1
x
=
0.78
÷
(
−0.6
)
x
=
−1.3
(3)
0.9
x
+
1.9
=
1.86
+
0.8
x
0.9
x
−
0.8
x
=
1.86
−
1.9
x
=
−0.04
÷
0.1
x
=
−0.4
(4)
−0.1
x
−
0.7
=
−0.63
−
0.8
x
−0.1
x
+
0.8
x
=
−0.63
+
0.7
x
=
0.07
÷
0.7
x
=
0.1
(5)
−0.2
x
+
1.5
=
−1.2
x
+
2.4
−0.2
x
+
1.2
x
=
2.4
−
1.5
x
=
0.9
÷
1
x
=
0.9