AMC 8 2008 Problem 7

If $\frac{3}{5}=\frac{M}{45}=\frac{60}{N}$ , what is $M+N$ ? $\textbf{(A)}\ 27 \textbf{(B)}\ 29 \textbf{(C)}\ 45 \textbf{(D)}\ 105 \textbf{(E)}\ 127$

Dataset text NuminaMath-1.5. Quoted with source.

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127

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