Question

me ajudem ....
2(x+1)-(x-1)=0

Answer 1

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

testando x=(-3),

2(-3+1)-(-3-1)=0
2(-2)-(-4)=0
(-4)+4=0
0=0

resposta : x=(-3)

bons estudos!