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Equations & Systems
hard
0:00.0
If
x
x
x
and
y
y
y
are positive integers such that
x
2
−
y
2
=
13
x^2 - y^2 = 13
x
2
−
y
2
=
13
, find
x
x
x
.
A
6
B
7
C
13
D
1
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