n(5^2x1/25)=3

Question

I am havein problems with this one and

(9-7)(5)=2(n)

but after i get the answer i have to tell what property it is..

Answer 1

(9-7)(5)=2(n)
2*5=2n
10=2n
10=2*5
10=10
n=5

Answer 2

did you get the answers yet?

Answer 3

LizardGuy gave you the answer to your second problem and showed how to solve it.