Respuesta :

Answer:

-2

Step-by-step explanation:

x + 2 + 2x -3 = 5x + 7  Combine like terms

3x -1 = 5x + 7  Subtract 3x from both sides

-1 = 2x + 7 Subtract 7 from both sides

-8 = 2x  Divide both sides by 2

-4 = x

AB is x + 2

-4 + 2 = -2