Question

resolva a operação do primeiro grau a seguir:​

Answer 1

Resposta:

x = -28

y = -12

Explicação passo-a-passo:

$\left \{ {{2x+2y = 5x-5y} \atop {\frac{x}{2} } = y-2} \right. \\\\\left \{ {{-3x +7y =0} \atop {x -2y =-4}} \right. \\\\\left \{ {{y-3x +7y=0} \atop {3x -6y = -12}} \right. \\\\y = -12\\x - 2(-12) = -4\\x = -28$