Question

resolva os sistemas x = 5y x = y = 12

Answer 1

$x = y = 12 \\ 5y = y = 12 \\ 5y - y = 12 \\ 4y = 12 \\ y = \frac{12}{4} \\ y = 3 \\ \\ x = 5y \\ x = 5.(3) \\ x = 15 \\ \\ logo \: solucao \: da \: equacao \: 15 \: e \: 3$