Resposta :
Resposta:
[tex]\textsf{Leia abaixo}[/tex]
Explicação passo a passo:
[tex]\mathsf{log\:(x + 1) - log\:y = 3\:log\:2}[/tex]
[tex]\mathsf{log\:\dfrac{x + 1}{y} = log\:8}[/tex]
[tex]\mathsf{\dfrac{x + 1}{y} = 8}[/tex]
[tex]\begin{cases}\mathsf{x + 1 = 8y}\\\mathsf{x - 4y = 7}\end{cases}[/tex]
[tex]\mathsf{x - 7 = 4y}[/tex]
[tex]\mathsf{x + 1 = 2x - 14}[/tex]
[tex]\mathsf{2x - x = 1 + 14}[/tex]
[tex]\boxed{\boxed{\mathsf{x = 15}}}\leftarrow\textsf{letra A}[/tex]