Question

ajudem pls, é pra hoje,ofereço 15 pontos​

Answer 1

Resposta:

$x=-2\\y=1$

Explicação passo a passo:

$\left \{ {{\frac{x+6y}{2} =2} \atop \ \frac{4x-6y}{2} =-7}} \right. \\\left \{ {{\frac{x+6y}{2}*2 =2*2} \atop \ \frac{4x-6y}{2}*2 =-7*2}} \right. \\\left \{ x+6y =4} \atop \ 4x-6y=-14}} \right. \\ \\5x+0=-10\\5x=-10\\x=\frac{-10}{5}=-2\\\\ x+6y =4\\-2+6y=4\\6y=4+2=6\\y=\frac{6}{6}=1$