Question

qual valor de -3(x-5)-2(2x+1)-8

Answer 1

$-3(x-5)-2(2x+1)=-8\to \\\\ -3x+15-4x-2=-8\to \\\\ -3x-4x=-8-15+2\to \\\\ -7x=--21~(-1)\to \\\\ 7x=21\to \\\\ x= \dfrac{21}{7} \to \\\\ \boxed{x=3}$

Answer 2

-3(x-5)-2(2x+1)-8
-3X+15-4X-2-8
-3X-4X+15-2-8
-7X+13-8
-7X+5  (-1)
  X=5/7