Question

Which property justifies the statement?

Answer 1

In tis question it is given that,

If x = y + 2 and y + 2 = 8, then x = 8.

Let's check out transitive property  which states that

If

$a=b \ and \ b=c$

Then,

$a=c$

In this question,

$a=x , b=y+2,c=2$

SO we can say that the given expression follows transitive property of equality .

And the correct option is the first option .

Answer 2

Transitive property of equality because you substituted x by 8