Question

a + b + c / 5 para a = - 3 , b = -9 e c = -8

Answer 1

$a=-3\\b=-9\\c=-8\\\\\\ \dfrac{a+b+c}{5} \to\\\\\\ \dfrac{-3+(-9)+(-8)}{5} \to\\\\\\ \dfrac{-3-9-8}{5} \to\\\\ \\\dfrac{-20}{5} \to \\\\\\ \boxed{-4}$