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©2025 数学クラブ http://sugaku.club/
月 日（ ）
● 次の方程式を解きなさい
[210-20]
(1)
2
9
−2
x
=
−
2
(2)
2
−5
x
=
−5
(3)
3
2
x
=
1
2
(4)
2
180
−5
x
=
−
49
(5)
2
2
x
=
2
(6)
2
1
−2
x
=
−
8
(7)
2
5
−5
x
=
−
9
(8)
2
20
5
x
=
9
(9)
2
2
−
x
=
−1
3
(10)
2
−2
x
=
−2
©2025 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
2
−2
x
9
=
−
2
2
x
9
=
4
x
3
=
±
2
(2)
2
−5
x
=
−5
2
x
=
1
x
=
±
1
(3)
3
2
x
2
=
1
2
x
2
=
3
x
6
=
±
3
(4)
2
−5
x
180
=
−
49
2
x
36
=
49
x
6
=
±
7
(5)
2
2
x
=
2
2
x
=
1
x
=
±
1
(6)
2
−2
x
1
=
−
8
2
x
1
=
16
x
1
=
±
4
(7)
2
−5
x
5
=
−
9
2
x
1
=
9
x
1
=
±
3
(8)
2
5
x
20
=
9
2
x
4
=
9
x
2
=
±
3
(9)
2
2
−
x
3
=
−1
2
x
3
=
2
x
6
=
±
2
(10)
2
−2
x
=
−2
2
x
=
1
x
=
±
1
