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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
[0E7-00]
(1)
9
x
−
7
43
=
−
8
8
(2)
−2
x
+
2
=
−8
2
(3)
−3
x
+
5
20
=
7
7
(4)
−8
x
+
7
79
=
8
8
(5)
5
x
−
1
7
=
8
4
©2026 数学クラブ http://sugaku.club/
月 日( )
【解答例】
(1)
9
x
−
7
43
=
−
8
8
9
x
−
7
=
−43
9
x
=
−43
+
7
x
=
−4
(2)
−2
x
+
2
=
−8
2
−2
x
+
2
=
−16
−2
x
=
−16
−
2
x
=
9
(3)
−3
x
+
5
20
=
7
7
−3
x
+
5
=
20
−3
x
=
20
−
5
x
=
−5
(4)
−8
x
+
7
79
=
8
8
−8
x
+
7
=
79
−8
x
=
79
−
7
x
=
−9
(5)
5
x
−
1
7
=
8
4
5
x
−
1
=
14
5
x
=
14
+
1
x
=
3