Question

Which equation is an identity?

A) 11-(2v+3)=-2v-8
B) 5w+8-w=6w-2(w-4)
C) 7m-2=8m+4-m
D) 8y+9=8y-3

I think the answer is D, but correct me if I am wrong.

Answer 1

B

Answer 2

An identity means they are the same thing for all values of the variable.

Answer 3

Answer is B because
5w+8-w=6w-2(w-4)
4w+8=6w-2w+8
4w+8=4w+8
both sides has 4w+8 so we will cancel it
and the answer is 1
in general we say it identity