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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)
−0.5
+
1.7
x
=
−6.42
−
2
x
(2)
−1.7
+
1.5
x
=
−1.3
x
+
3.62
(3)
0.3
x
+
0.2
=
2
+
1.8
x
(4)
−1.6
−
1.5
x
=
−1.2
x
−
1.33
(5)
1.3
+
0.7
x
=
1.44
−
0.7
x
©2026 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
−0.5
+
1.7
x
=
−6.42
−
2
x
1.7
x
+
2
x
=
−6.42
+
0.5
x
=
−5.92
÷
3.7
x
=
−1.6
(2)
−1.7
+
1.5
x
=
−1.3
x
+
3.62
1.5
x
+
1.3
x
=
3.62
+
1.7
x
=
5.32
÷
2.8
x
=
1.9
(3)
0.3
x
+
0.2
=
2
+
1.8
x
0.3
x
−
1.8
x
=
2
−
0.2
x
=
1.8
÷
(
−1.5
)
x
=
−1.2
(4)
−1.6
−
1.5
x
=
−1.2
x
−
1.33
−1.5
x
+
1.2
x
=
−1.33
+
1.6
x
=
0.27
÷
(
−0.3
)
x
=
−0.9
(5)
1.3
+
0.7
x
=
1.44
−
0.7
x
0.7
x
+
0.7
x
=
1.44
−
1.3
x
=
0.14
÷
1.4
x
=
0.1