Question

x+y=-8 2x-y=-4
ayuda porfavor es para hoy

Answer 1

$\begin{bmatrix}x+y=-8\\ 2x-y=-4\end{bmatrix}$

Hallemos la ecuacion :D

$\begin{bmatrix}2\left(-8-y\right)-y=-4\end{bmatrix}\\\\\\\begin{bmatrix}-16-3y=-4\end{bmatrix}\\\\\\-16-3y+16=-4+16\\\\\\-3y=12\\\\\\\frac{-3y}{-3}=\frac{12}{-3}\\\\\\y=-4$

Hallamos y= -4

$x=-8-\left(-4\right)\\\\\\x=-4$

Las soluciones son...

y= -4    ,    x=-4