Question

determine a raiz dessa equação -2x-2=-5

Answer 1

$-2x-2=-5\\\\ -2x=-5+2\\\\ -2x=-3\\\\ x=\dfrac{-3}{-2}\\\\ x=\dfrac{3}{2}$

Answer 2

-2x -2 = -5
-2x = -5 + 2   >>> inverte sinal
-2x = -3

x = -3/-2 >>> sinais iguais: positivo
x = 3/2