Which equation will result if the substitution method is used to solve the following system of linear equations?

x – y = 7
x = y + 3

A.
x – y = y + 3

B.
x = (7 – x) + 3

C.
x – (y + 3) = 7

D.
(y + 3) – y = 7

Question

Which equation will result if the substitution method is used to solve the following system of linear equations? 
 
x – y = 7 
x = y + 3
 
 A.
x – y = y + 3
 
 B.
x = (7 – x) + 3
 
 C.
x – (y + 3) = 7
 
 D.
(y + 3) – y = 7

anonymous · Answer

x - y = 7
x = y+3

(y+3) - y = 7

anonymous · Answer

If x = (y+3), replace x with (y+3)