Question

Ayuda plis, es para mañana ​

Answer 1

Respuesta:

$\frac{a}{a + 2} = \frac{b}{b + 4} = \frac{c - 3}{c + 3} = k \\ \\ \frac{a + b + c - 3}{a + b + c + 9} = \frac{27 - 3}{27 + 9} = \frac{18}{30} = \frac{3}{5} \\ \\ \frac{a}{a + 2} = \frac{3}{5} \\ 5a = 3a + 6 \\ 2a = 6 \\ a = 3 \\ \\ \frac{b}{b + 4} = \frac{3}{5} \\ 5b = 3b + 12 \\ 2b = 12 \\ b = 6 \\ \\ \frac{c - 3}{c + 3} = \frac{3}{5} \\ 5c - 15 = 3c + 9 \\ 2c = 24 \\ c = 12 \\ \\ 3 \times 6 - 12 = 18 - 12 = 6$