Question

If XY+20=YW and XY=DT then DT+20=YW
What property is this

Answer 1

you are "substituting" using the knowledge that XY = DT to replace XY in the first equation with DT in the last equation... so I believe it is "Substitution"

Answer 2

Thanks!

Answer 3

Does that make sense? You have to be careful not to confuse it with "transitive"

Answer 4

I honestly have no Idea on these types of questions...

Answer 5

Let's replace those with the letters a, b, and c so the equations are easier to read:

If
a+20=b and
a=c

Then
c+20=a

Answer 6

Okay Thanks!

Answer 7

Sorry, for the last equation, I meant to write:

c+20=b