[文字サイズの変更]
▼
▲
©2025 数学クラブ http://sugaku.club/
月 日( )
● 次の方程式を解きなさい
[0E3-10]
(1)
1.8
x
+
1.8
=
3.33
+
0.1
x
(2)
0.7
x
+
1.1
=
0.93
+
0.8
x
(3)
−1.7
−
1.5
x
=
−6.63
+
1.4
x
(4)
−1.2
x
+
1.9
=
1.9
x
−
3.99
(5)
0.8
−
0.7
x
=
1.04
−
0.1
x
©2025 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
1.8
x
+
1.8
=
3.33
+
0.1
x
1.8
x
−
0.1
x
=
3.33
−
1.8
x
=
1.53
÷
1.7
x
=
0.9
(2)
0.7
x
+
1.1
=
0.93
+
0.8
x
0.7
x
−
0.8
x
=
0.93
−
1.1
x
=
−0.17
÷
(
−0.1
)
x
=
1.7
(3)
−1.7
−
1.5
x
=
−6.63
+
1.4
x
−
1.5
x
−
1.4
x
=
−6.63
+
1.7
x
=
−4.93
÷
(
−2.9
)
x
=
1.7
(4)
−1.2
x
+
1.9
=
1.9
x
−
3.99
−1.2
x
−
1.9
x
=
−3.99
−
1.9
x
=
−5.89
÷
(
−3.1
)
x
=
1.9
(5)
0.8
−
0.7
x
=
1.04
−
0.1
x
−
0.7
x
+
0.1
x
=
1.04
−
0.8
x
=
0.24
÷
(
−0.6
)
x
=
−0.4