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

Answer 1

x - y = 7
x = y+3

(y+3) - y = 7

Answer 2

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