Which equation shows the substitution method being used to solve the system of linear equations?

x – y = 7
x = y + 3

A.
(y + 3) – y = 7

B.

Question

Which equation shows the substitution method being used to solve the system of linear equations?

x – y = 7 
x = y + 3

A. 
(y + 3) – y = 7

B. <<<<<<<<I think?
x = (7 – x) + 3

C. 
x – y = y + 3

D. 
x – (y + 3) = 7

anonymous · Answer

I think it is C, I am unsure.

rebecca1588 · Answer

Thanks :)

anonymous · Answer

This is confusing...

x-3=y
and
x+7=y

anonymous · Answer

oh wait nvm
x-3=y...
x-7=y...

rebecca1588 · Answer

If I get this 1 wrong its no big deal ^^

anonymous · Answer

D cannot be right because x-x would equal zero not seven

anonymous · Answer

A could be right, it shows the first equation... 
x-y=7

anonymous · Answer

I believe it is A