Question

3x + 5y = 80 5x + 10y = 95

Answer 1

Respuesta:

Explicación paso a paso:

$3x + 5y = 80 5x + 10y = 95\\\\\begin{bmatrix}3x+5y=80\\ 5x+10y=95\end{bmatrix}\\\\\begin{bmatrix}5\cdot \frac{80-5y}{3}+10y=95\end{bmatrix}\\\\\begin{bmatrix}\frac{400+5y}{3}=95\end{bmatrix}\\\\x=\frac{80-5\left(-23\right)}{3}\\\\x=65\\\:y=-23$