Question

6 x + 2y = -28
X-3y= -8

Answer 1

$\large \boxed{ \begin{array}{l} m\acute{e}todo\,da\, substituic_{\!\!,}\tilde a o \\ \\ \begin{cases} 6x + 2y = - 28 \\ x - 3y = - 8\end{cases} \\ \\ \begin{cases}6x + 2y = - 28 \\ x = - 8 + 3y \end{cases} \\ \\ 6( - 8 + 3y) + 2y = - 28 \\ \\ \boxed{y = 1} \\ \\ x = - 8 + 3 \times 1 \\ \\ \boxed{x = - 5} \\ \\ \boxed{ \boxed{S = \{ - 5,1 \}}}\end{array}}$