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Mathematics
Mathematics
Problem
If
1
x
+
5
=
x
−
5
20
\displaystyle \frac{1}{\sqrt{x}+\sqrt{5}}=\frac{\sqrt{x}-\sqrt{5}}{20}
x
+
5
1
=
20
x
−
5
, then
x
x
x
equals a)
45
45
45
b)
5
5
5
c)
25
25
25
d)
15
15
15
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