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

x – y = 7
x = y + 3

A.
x – (y + 3) = 7

B.
x = (7 – x) + 3

C.
(y + 3) – y = 7

D.
x – y = y + 3

Question

Which equation shows the substitution method being used to solve the system of linear equations? 
 
x – y = 7 
x = y + 3
 
 A.
x – (y + 3) = 7
 
 B.
x = (7 – x) + 3
 
 C.
(y + 3) – y = 7
 
 D.
x – y = y + 3

anonymous · Answer

which one do you think? any thoughts?

anonymous · Answer

you know what a substitution method is, then you should be able find the answer.