Which expression shows x and it’s opposite are 0?

Question

x+(-1/2)=0
x+(1/2)=0
x+(-x) =0
x+x =0

OPPOSITES MAKE ZERO QUICK CHECK

Answer 1

The expression that shows x and its opposite are 0 is x+(-x)=0.

Answer 2

which expression correctly shows the sum of opposite numbers?
A. (-25) + (-25)=0
B. (-25) + 25 =50
C. (-25)+25=0
D. (-25)+(-25)=-50

Answer 3

I think its (-25)+25=0 but I'm not sure