Question

1)Considere as matrizes​

Answer 1

Explicação passo-a-passo:

$4-x=x\\\\x+x=4\\\\2x=4\\\\x=\frac{4}{2}\\ \\x=2$

$2-y=y\\\\y+y=2\\\\2y=2\\\\y=\frac{2}{2} \\\\y=1$

Resposta B