Question

Como se resolve 2(×+1)-(×-1)=0

Answer 1

2x + 2 - x + 1 = 0

2x - x = -2 -1

x = -3    ok

Answer 2

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

2x + 2 - x + 1 = 0

2x - x = 0 - 2 - 1

x = -3