Question

como resolver 2(x+1)-(x-1)=0

Answer 1

2(x+1)-(x-1)=0
2x + 2 - x + 1 = 0
2x - x = -2 - 1
x = -3

Answer 2

$2(x+1)-(x-1)= 0\\\\ 2x+2-x+1=0\\\\\ 2x-x = -3\\\\\ \boxed{x=-3}$