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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
[210-20]
(1)
2
3
−3
x
=
−
49
(2)
2
3
x
=
3
(3)
2
−5
x
=
−5
(4)
1
2
1
−
x
=
−
3
2
(5)
2
8
−2
x
=
−
25
(6)
1
2
3
x
=
3
4
(7)
2
1
2
x
=
2
(8)
2
9
−2
x
=
−
2
(9)
2
5
−5
x
=
−
9
(10)
2
1
x
=
2
©2026 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
2
−3
x
3
=
−
49
2
x
1
=
49
x
1
=
±
7
(2)
2
3
x
=
3
2
x
=
1
x
=
±
1
(3)
2
−5
x
=
−5
2
x
=
1
x
=
±
1
(4)
1
2
−
x
3
1
=
−
2
2
x
3
=
2
x
6
=
±
2
(5)
2
−2
x
8
=
−
25
2
x
4
=
25
x
2
=
±
5
(6)
1
2
x
3
3
=
4
2
x
9
=
4
x
3
=
±
2
(7)
2
2
x
1
=
2
2
x
1
=
4
x
1
=
±
2
(8)
2
−2
x
9
=
−
2
2
x
9
=
4
x
3
=
±
2
(9)
2
−5
x
5
=
−
9
2
x
1
=
9
x
1
=
±
3
(10)
2
x
1
=
2
x
2
=
±
2