Question

x+3y=6 2x+y=4
alguém sabe???​

Answer 1

Resposta:

$\begin{bmatrix}x+3y=6\\ 2x+y=4\end{bmatrix}$

$x=6-3y\\\begin{bmatrix}2\left(6-3y\right)+y=4\end{bmatrix}\\\begin{bmatrix}12-5y=4\end{bmatrix}\\y=\frac{8}{5}$

$x=6-3y$

$x=6-3\cdot \frac{8}{5}\\x=\frac{6}{5}$