Question

5x+3y=7,\:\:3x-5y=-23

ayudemen y doy corona

Answer 1

Respuesta:

$\begin{bmatrix}5x+3y=7\\ 3x-5y=-23\end{bmatrix}\\\\\\\begin{bmatrix}3\cdot \frac{7-3y}{5}-5y=-23\end{bmatrix}\\\\\\\begin{bmatrix}\frac{21-34y}{5}=-23\end{bmatrix}\\\\\\x=\frac{7-3\cdot \:4}{5}\\\\x=-1\\\\\\x=-1,\:y=4$