Question

\(\dfrac{121m+9n}{-10m-3n}\) với \(\dfrac{m}{3}\)=\(\dfrac{n}{5}\)

Answer 1

với=với

Answer 2

Đặt \(\dfrac{m}{3}=\dfrac{n}{5}=k\)

\(\Leftrightarrow\left\{{}\begin{matrix}m=3k\\n=5k\end{matrix}\right.\)

Ta có: \(\dfrac{121m+9n}{-10m-3n}\)

\(=\dfrac{121\cdot3k+9\cdot5k}{-10\cdot3k-3\cdot5k}=\dfrac{363k+45k}{-30k-15k}\)

\(=\dfrac{408k}{-45k}=-\dfrac{136}{15}\)