Help with 7th grade pre-algebra

[Spiderman764]

I have a problem that says What is the value of the expression –c + d when c = –3.5 and
d = –12.8? I need help with the -c part since c=-3.5 does -c=+3.5?

 

[Deleted member 4993]

I have a problem that says What is the value of the expression –c + d when c = –3.5 and
d = –12.8? I need help with the -c part since c=-3.5 does -c=+3.5?

Yes

-c + d = -(-3.5) + (-12.8) = 3.5 - 12.8 = ???