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2008 AMC 8 Question 7

AMC8 · 2008 AMC 8

Question 7

If $\dfrac{3}{5}=\dfrac{M}{45}=\dfrac{60}{N},$ what is $M+N?$
  1. $ \ 27 $
  2. $ \ 29 $
  3. $ \ 45 $
  4. $ \ 105 $
  5. $ \ 127 $