GMAT Quantitative Reasoning Quiz
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If
x
+
y
2
=
5
\frac{x + y}{2} = 5
2
x
+
y
=
5
and
x
−
y
3
=
2
\frac{x - y}{3} = 2
3
x
−
y
=
2
, what is the value of
x
2
−
y
2
x^2 - y^2
x
2
−
y
2
?
A
60
B
70
C
80
D
90
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