[tex] > resolucao \\ \\ \\ x = patos \\ y = gatos \\ \\ \\ x + y = 19 \: > > > x = 19 - y \\ 2x + 4y = 54 \\ \\ \\ 2(19 - y) + 4y = 54 \\ 38 - 2y + 4y = 54 \\ 2y = 54 - 38 \\ 2y = 16 \\ y = \frac{16}{2} \\ y = 8 \\ \\ \\ x = 19 - y \\ x = 19 - 8 \\ x = 11 \\ \\ \\ resposta \: > \: sao \: 8 \: gatos \: \\ \\ \\ = = = = = = = = [/tex]
