Question

X+y=6
2x+y=4
Método da substituição

Answer 1

$\left \{ {{x+y=6} \atop {2x+y=4}} \right.$

$\to y=6-x$

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$2x+y=4$

$2x+(6-x)=4$

$2x+6-x=4$

$x=-6+4$

$x=-2$

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$x+y=6$

$-2+y=6$

$y=6+2$

$y=8$