Respuesta :

Answer: -1

Explanation:
-a - (-8) + b 
-a + 8 + b (because the - - signs cancel out)
-(2) + 8 + (-7) 
-2 + 8 - 7 = -1
[tex]Hello. Plug in the variables. -2 - (-8) + -7 = - 1 You're welcome. [/tex]