Respuesta :

[tex]\bf -2x-4\le -4x+4\implies -2x\underline{+4x}-4 \le -4x\underline{+4x}+4 \\\\\\ 2x-4\le 4\implies 2x-4\underline{+4}\le 4\underline{+4}\implies 2x\le 8 \\\\\\ x\le \cfrac{8}{2}\implies x\le 4[/tex]