Question

sistema de equação : 2x - 2y = 12 e x + 2y =11

Answer 1

A resposta é: X= 7,666

Answer 2

$2x-2y=12 \\ \frac{2x}{2} - \frac{2y}{2}= \frac{12}{2} \\ x- \frac{2y}{2}= \frac{12}{2} \\ x-y= \frac{12}{2} \\ x-y=6$