Question

Obtenha a equação da reta abaixo​

Answer 1

$\Large\boxed{\begin{array}{l}\sf\begin{vmatrix}\!\sf-\!1&\sf1&1\\\sf0&\sf4&\sf1\\\sf x&\sf y&\sf1\end{vmatrix}=0\\\sf -1(4-y)-1\cdot(0-x)+1\cdot(0-4x)=0\\\sf -4+y+x-4x=0\\\sf-3x+y-4=0\cdot(-1)\\\sf r: 3x-y+4=0\end{array}}$