Question

como resolver f(x) -1/2x-4

Answer 1

Fazendo $- \frac{1}{2}x -4 =0$, temos:

$- \frac{1}{2}.x = -\frac{x}{2} \,\,deste \,\,modo,\\\\ - \frac{x}{2} -4 = 0\\\\ -\frac{x}{2}\cdot \:2-4\cdot \:2=0\cdot \:2\\\\ -x-8 = 0 \iff-x = 8\,\,multiplicando \,\,a\,\,igualdade\,\,por\,\,(-1)\\\\ x = -8$