Question

o valor de x e de y obrigada

Answer 1

$\left \{ {{2x - y = 6 .(2)} \atop {x + 2y =8}} \right. = \left \{ {{4x -2y=16} \atop {x +2y=8}} \right. (+) = 5x = 24 \\\\ x= 24/5\\\\ x + 2y = 8 \\24/5 +2y = 8\\10y + 24 = 80\\10y = 56\\ y = 56/10\\ y = 28/5 \\\\\\ S = [24/5; 28/5]$