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Mathematics
Problem
AMC 8,2009 Problem 7: If
3
5
=
M
45
=
60
N
\frac{3}{5} = \frac{M}{45} = \frac{60}{N}
5
3
=
45
M
=
N
60
what is
M
+
N
M + N
M
+
N
?
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