Question

Abram a imagem. Me ajudem por favooor!!!​

Answer 1

Resposta:

Oie!!

Opção d

Explicação passo-a-passo:

Vamos lá! De acordo com a diferença entre a diagonal principal e secundária, temos:

$det\ 12.x-17.20=\dfrac{1}{10} \\\\\\det\ 12x-340=\dfrac{1}{10} \\\\\\det\ 12x=\dfrac{1}{10} +340\\\\\\det\ 12x=\dfrac{1+3400}{10} \\\\\\det\ 120x=3401\\\\\\det\ x=\dfrac{3401}{120} \\\\\\\boxed{det\ x=28,34}\\\\\\\\Bons\ estudos!!!\\Prof\ Alexandre\\Bom\ Conselho/PE$