Question

-a+b+(-7)
a= -8 and b =-2

Answer 1

It would be: -a + b + (-7)

Substitute for a = -8 and b = -2
-(-8) + (-2) + (-7)
8 - 2 - 7
8 - 9 = -1

In short, Your Answer would be -1

Hope this helps!

Answer 2

-a+b+(-7)
-(-8)+(-2)+(-7)
8 - 2 - 7
6 - 7
= -1