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©2018 数学クラブ http://sugaku.club/
月 日（ ）
● 次の方程式を解きなさい
[210-00]
(1)
2
5
x
=
180
(2)
2
−3
x
=
−27
(3)
2
−3
x
=
−75
(4)
2
4
x
=
3
(5)
2
9
x
=
3
(6)
2
8
x
=
4
(7)
2
2
x
=
2
(8)
2
3
x
=
75
(9)
2
4
x
=
3
(10)
2
5
x
=
10
(11)
2
9
x
=
3
(12)
2
6
x
=
1
©2018 数学クラブ http://sugaku.club/
月 日（ ）
【解答例】
(1)
2
5
x
=
180
2
x
=
36
x
=
±
6
(2)
2
−3
x
=
−27
2
x
=
9
x
=
±
3
(3)
2
−3
x
=
−75
2
x
=
25
x
=
±
5
(4)
2
4
x
=
3
2
x
3
=
4
x
1
3
=
±
2
(5)
2
9
x
=
3
2
x
1
=
3
x
3
=
±
3
(6)
2
8
x
=
4
2
x
1
=
2
x
2
=
±
2
(7)
2
2
x
=
2
2
x
=
1
x
=
±
1
(8)
2
3
x
=
75
2
x
=
25
x
=
±
5
(9)
2
4
x
=
3
2
x
3
=
4
x
1
3
=
±
2
(10)
2
5
x
=
10
2
x
=
2
x
2
=
±
(11)
2
9
x
=
3
2
x
1
=
3
x
3
=
±
3
(12)
2
6
x
=
1
2
x
1
=
6
x
6
=
±
6